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Why Twice a Day Isn't Enough: Mimicking the Planktonic Buffet for High-Energy Reef Fish

Dan Lichens — Sun, 14 Sep 2025 12:35:00 -0400

Why Twice-a-Day Isn't Enough: Mimicking the Planktonic Buffet for High-Energy Reef Fish

Imagine the bustling life of an Anthias in a vast coral reef. It's constantly darting, schooling, and scanning the water column for its next meal. This energetic lifestyle, typical of many active reef fish, demands a near-constant intake of food. Their natural diet? Plankton – a myriad of tiny organisms perpetually drifting through the ocean currents. For these fish, the reef is a continuous, living buffet, sustaining their high metabolic rates and vibrant activity.

The Limitations of Traditional Aquarium Feeding

Now, consider the typical reef aquarium setup. Many hobbyists diligently feed their fish once or twice a day, perhaps even three. While well-intentioned, what transpires during the lengthy intervals between these feedings? For high-energy planktivores, these periods are essentially fasts, leading to fluctuating energy levels and potential stress. This can contribute to several undesirable outcomes in a captive environment:

Suboptimal Digestion: When food finally arrives, fish may gorge themselves, leading to rapid ingestion that can strain their digestive systems and reduce nutrient absorption.
Increased Intra-Species Aggression: Competition for limited food resources can escalate, particularly in communal tanks, leading to heightened stress, territorial disputes, and even physical injury among inhabitants.
Compromised Growth and Vigor: Inconsistent food availability can hinder optimal growth, diminish color vibrancy, and potentially weaken the immune system, making fish more susceptible to disease.
Reduced Natural Behavior: Fish may spend less time exhibiting natural foraging and schooling behaviors, instead focusing intently on anticipating the next meal.

The Planktonic Solution: Integrating an Automatic Feeder

The solution lies in mimicking nature's design: consistent, small, frequent meals. An automatic fish feeder, like the Plank, can replicate the constant availability of a planktonic food source. We at Avast Marine developed the Plank precisely because we observed these challenges in our own systems and heard the same concerns from fellow hobbyists. We understood that for high-energy reef fish, a continuous, living buffet needs a continuous, reliable dispenser. Imagine extending that continuous reef buffet directly into your aquarium, providing a steady supply of nutrition throughout the waking hours.

Benefits of Implementing Frequent, Automated Feeding

Stable Energy Levels and Metabolism: Ensures a continuous supply of food, preventing drastic energy dips and supporting the naturally high metabolism of active reef fish.
Reduced Stress and Enhanced Harmony: By minimizing food scarcity, you significantly reduce competition and aggression, promoting a more peaceful and harmonious environment for all tank inhabitants.
Optimal Health and Display: A consistent dietary intake supports robust growth, intensified coloration, stronger immune responses, and overall vitality, allowing your fish to thrive. As many of our customers attest, consistent feeding "made a noticeable difference in the health and vitality" of their fish.
Convenience and Peace of Mind: Frees you from rigid feeding schedules and provides assurance that your fish are well-fed, even when you're away from home. Users frequently highlight the "peace of mind" and how it's a "reliable workhorse."

The Plank: Engineered for the Demanding Reef Keeper

While the benefits of automated feeding are clear, not all devices are created equal. Choosing the right feeder for your specific reef setup is crucial. Key considerations often include the feeder's capacity to minimize refills, the precision of its programming for flexible feeding schedules, its compatibility with various food types, robust moisture protection to prevent clumping, and overall ease of use and maintenance.

We engineered the Plank with these critical factors firmly in mind, designing it specifically for the rigors of a saltwater environment and the demanding reef keeper. Its robust construction and customizable programming allow for precise, frequent feeding, ensuring your high-energy fish receive the consistent nutrition they need. The Plank isn't just a feeder; it's a testament to thoughtful design. We've ensured it effectively handles dry foods like flakes and pellets, and it pairs perfectly with our Reef Jerky - a premium, nutrient-dense dried whole plankton that fish absolutely love. The Plank's integrated features, like its precise dispensing and robust moisture protection, are specifically tailored to maintain food quality in a humid setting. This thoughtful design is why users consistently rate it highly, with many calling it "the best feeder on the market" and praising its "reliable performance" and "solid construction."

From Intermittent to Perpetual: A Planktonic Revolution for Your Reef

Don't let traditional feeding schedules limit the potential of your high-energy reef fish. Embracing the "planktonic approach" with the Avast Marine Plank offers profound benefits. It not only supports the biological needs of your fish by providing a constant food supply but also enhances the overall stability and natural behavior within your miniature ecosystem. Witness your healthy, vibrant fish exhibiting their natural behaviors, knowing they're consistently nourished and stress-free. As countless reviews attest, this small adjustment can yield a significant positive impact on the well-being and longevity of your prized reef inhabitants, making your reef tank truly thrive.

The Joy of Feeding: Pure Joy or Necessary Evil… Fish tell all!

Aaron Dus — Mon, 15 Sep 2025 10:38:00 -0400

Whether you’re a seasoned hobbyist or just starting out, feeding isn’t just a task. It’s a ritual that deepens your connection with your reef and brings the whole system to life. Have you ever noticed how your fish follow your movements as you walk by the tank? You’re not imagining it. Studies show that many species, including popular reef fish, can recognize the faces of the people who feed them, even when food isn’t in sight. Over time, they also learn your schedule and begin to gather at the front of the tank, anticipating their next meal.

Feeding Time Is More Than Food

What begins as routine maintenance becomes an ongoing interaction with your tank. As your fish grow comfortable, you’ll notice shy species venturing out and curious ones darting closer at mealtime. Corals also respond, swelling or extending their feeders in anticipation. Each feeding strengthens the ecosystem and gives you the chance to:

Observe behaviors and interactions
Monitor health and appetite
Build trust with sensitive species
Feel connected to your tank

Consistency Builds Health and Harmony

Research confirms what reefkeepers already observe. A 2010 study on seabream found that feeding acts as a strong “zeitgeber,” or time cue, for circadian rhythms, even in complete darkness. Other studies on sea bass have shown clear pre-meal activity hours before feeding when they are kept on a fixed schedule.

In reef tanks, a consistent rhythm reduces stress and aggression, minimizes competition, and helps corals and anemones flourish with better growth, color, and resilience. Regular, thoughtful feeding supports metabolism in active fish, promotes vibrant coral coloration, helps stressed animals recover, and reinforces natural behaviors like hunting and foraging.

5 Practical Tips to Spark Joy

Feeding is a rewarding aspect of reefkeeping. Here are five tips to maximize it.

Create a routine – Predictable schedules can reduce aggression and promote calmness.
Be patient with newcomers – New fish watch and learn from their tankmates.
Choose quality foods – Ingredients matter for long-term health and vitality.
Offer variety – Different marine proteins and plant-based foods keep fish colorful and energetic.
Balance automation and interaction – Auto-feeders add consistency, while hand-feeding builds connection.

Closing Thoughts: Feed With Intention

The act of feeding is far more than nourishment. It is a moment of presence, a chance to connect with your reef, and an opportunity to shape the health and harmony of the ecosystem you’ve built. When you feed with intention, you’re not just sustaining life; you’re cultivating a thriving world under glass that rewards you daily with color, movement, and wonder.

Related Avast Marine Products

To explore our feeding tools and premium foods, such as the Micro Auto-Feeders and Reef Jerky, click the links or visit the Avast Marine shop page.

A few additional articles to explore:

Your fish might recognize your face (link)
Food anticipatory behaviour on European seabass in sea cages: activity, positioning, and density-based approaches (link)
Wild fish use visual cues to recognize individual divers (link)

Avast Labs is Live: Inside-Out Innovation for the Reefkeeping Community

Dan Lichens — Tue, 16 Sep 2025 11:00:00 -0400

Avast Labs is Live: Inside-Out Innovation for the Reefkeeping Community

Since the beginning, Avast Marine has stood for smart tools, built with purpose, and backed by people who live and breathe the hobby. But behind every polished release was a messier journey: napkin sketches, failed prototypes, waterlogged test rigs, and the occasional stroke of pirate brilliance.

Now, we're opening the door to that process.

Welcome to Avast Labs.

What is Avast Labs? Our Innovation Engine

Avast Labs is our in-house R&D engine where concepts are sketched, tested, reworked, and proven before they ever hit the storefront. It’s a commitment to building better gear through better understanding. More than just a section of our website, Labs is a dedicated space where we publish our research, share the results, and invite you to follow along as we turn bold ideas into real tools for real tanks.

Some Labs projects graduate to become full Avast Marine products, earning proper inventory, warranty, and support. Some stay small-batch. Some are free. But all are designed to challenge convention and improve the way aquarists interact with their gear.

Image: Matey clicker and dispenser drive mechanism concept

Why Avast Labs Exists: Our Purpose and Commitment

We don’t just build new equipment. We ask the hard questions first, and keep asking until we get answers.

Labs gives us a space to:

Share Research Openly: From ozone dosing to feeder mechanics to system chemistry, we'll share what we learn.
Co-create with Community: We want to collaborate with hobbyists, engineers, and curious minds who want to contribute. We'll listen to feedback and course-correct in public.
Document the Process: We'll share the journey, not just the outcome, turning support questions into published how-tos.
Iterate Quickly: Prototype and test new ideas without disrupting core operations, allowing us to launch small, gauge interest, and get real feedback before investing big.

Image: Performing phosphate test on various macro algae for Reef Jerky

What Makes Avast Labs Different? Proven Impact

You might already be familiar with some of our work that exemplifies the Labs approach. Here are a few examples of what that looks like:

Safer, Smarter Ozone Use

Most reefkeepers rely on ORP readings without understanding what they're really measuring. We’ve spent years studying ozone behavior in reef tanks - not just theorizing, but actually running controlled trials, tracking side effects, and refining our reactor and abatement systems. When existing tools didn’t cut it, we built better ones. We even developed new techniques to visually verify ozone activity - allowing safe dosing without a $500 meter. You’ll see all of this work continue to be documented in the Labs blog.

The Kalkulator Wasn’t a Guess

We didn’t just make a calculator - we ran dosing trials, measured precipitation curves, and tested everything from saturation stability to pH rebound across tank types. The result? A real-world tool that lets hobbyists make informed dosing decisions based on actual system behavior, not just chemistry theory. And the experiments that led to it? You’ll soon find them here.

Feeding, Quantified

Auto feeders are everywhere - but we wanted to know what actually worked. What auger design delivers consistent output across pellet sizes? How often do reef fish eat in the wild, and how does that translate to nutrient load in a closed system? The Plank, the MINI, and the Matey weren’t just built, they were measured, dialed, and iterated. The research behind them is what made them work. And now we’re documenting those insights for others to build on.

Image: Testing ambient ozone levels post abatement

What to Expect from the Avast Labs Blog: Our Content Categories

The Avast Labs blog is the heart of this system. It’s how we connect R&D, product launches, customer feedback, and long-term support in one place. Here’s how it breaks down:

Lab Notes: Sketches, test results, build logs, and design tradeoffs. You’ll see what we’re working on before it ships - and sometimes before it even works.
Now Shipping: Launches, limited-run drops, packaging updates, and final specs. These are the “graduate and scale” moments when concepts become gear.
In the Wild: Real-world installs, creative customer setups, and performance snapshots. From frag systems to commercial integrations, this is where we spotlight you.
Feedback Loop: We ask. You weigh in. We build smarter. Polls, prototype votes, support trends, and roadmap pivots all live here.
Tips & Techniques: How-to guides, maintenance walkthroughs, and system-wide insights. From feeder programming to pH tuning, this is where we go deep on application.

Image: Prototype v2 Skimmate Locker magnetic latching shut off valve

Radical Transparency & What It Means For You

Every experiment, adjustment, and decision in Labs is shared - not just the polished stuff. You’ll see charts, logs, time-lapses, controller code, and even the failures. Why? Because the story behind the product is part of the product. We believe that kind of transparency builds trust. It also makes us better engineers.

We’re not trying to crank out trendy gear. We’re trying to make tools that work, and prove it. This means for you:

First access to new tools.
A behind-the-scenes look at how they're made and tested.
The chance to shape features before launch.
Confidence that the best gear will graduate to full Avast Marine support.
A permanent place to find deep technical content backed by real data.
If we release something, you’ll know why. If we change something, you’ll see how. If you have a better idea, we’ll test it.

The Labs Ethos

We approach everything here with:

Scientific curiosity
Measured decisions
A willingness to challenge norms
Respect for the hobbyist’s time, tank, and brainpower
The pirate mindset - bold, hands on, and a little disruptive

Whether you’re a DIY reefer, chemistry nerd, an automation geek, or just someone who wants to know what’s really going on behind the equipment - Avast Labs is open.

Follow along. Ask questions. Tell us when we’re wrong. That’s how we all get better.

Welcome Aboard!

Why Seconds Matter when Using A Plank & Plank MINI

Aaron Dus — Tue, 25 Nov 2025 17:51:00 -0500

Shelly G4 Smart WIFI Plug & A Plank or Plank MINI

Disclaimer: Shelly has not sponsored, endorsed, or promoted this post. We simply recommend their smart plugs because they work reliably with the Plank and Plank MINI.

When it comes to feeding your reef, consistency is everything. The Plank and Plank MINI were designed for exactly that: reliable, repeatable micro-feeding that keeps your fish active and your corals thriving. But the last part of the equation lives outside the feeder itself - the timer.

A good timer keeps your feeding schedule on track, no matter what’s happening in your home or your network. A great timer has two features that matter far more than most reefers realize:

A built-in clock that persists after power outages or wifi outages
The ability to run schedules with precision down to the second

This is why we recommend pairing your Plank or Plank MINI with a Shelly smart plug. Shelly devices are simple to set up, reliable during outages, cloud-optional, and give you full control over on-time, off-time, and cycle duration, down to the exact number of seconds your feeder needs.

Why the Right Timer Makes a Difference

Many Wi-Fi plugs or power bars lose their internal clocks when power goes out or Wi-Fi drops. When that happens, your precise feeding schedule disappears, and your Plank may start feeding at random times or not at all.

Shelly plugs avoid this problem by storing their time locally. Once you set the timezone in the app, the schedule stays intact, even if Wi-Fi goes down. And when the power comes back, the plug picks up right where it left off.

For a feeder that relies on timed runtimes measured in seconds, this matters a lot. One 90-second dose of Reef Jerky equals roughly one cube of frozen food. With micro-feeding, those seconds add up quickly. So having a plug that lets you dial in exactly how long the feeder runs each day ensures your tank gets the same amount of food, at the same time, every day.

A Reliable Way to Run Your Plank or Plank MINI

Shelly’s new Gen 4 wall plugs are simple to set up and extremely consistent. Here’s why they pair so well with the Plank line:

Precise second-based timing for accurate feeding
Built-in local clock that keeps schedules running without Wi-Fi
Advanced scheduling for hourly, daily, or custom runtimes
Cloud optional. Works entirely on your home network if you prefer
Fast setup through the Shelly app
Available in black or white to match your gear

Even if you’re new to smart plugs, the Shelly interface is straightforward. Most reefers can set up a full schedule in just a few minutes.

Why We Recommend to Plank/MINI Owners

The Plank and Plank MINI were built to deliver accurate, repeatable micro-feeding. Pairing them with a plug that can’t reliably keep time undermines the entire point of owning a precision feeder.

A Shelly Smart plug gives you:

Confidence that feedings won’t drift if the power blinks
Exact second-based control to match your tank’s needs
A simple, clean app experience
A setup that just works, day after day

If you're feeding Reef Jerky, pellets, or your own custom mix, these details matter. Consistency reduces waste, maintains nutrient stability, and supports healthier fish and corals. The right plug makes all of that easier.

Final Thoughts

Whether you’re setting up your first Plank MINI or fine-tuning your long-running Plank, the Shelly smart plug is the simplest and most dependable way to automate your feeding schedule. Seconds matter, stability matters, and in the world of reef tanks, both lead to better results.

If you’d like help refining your setup or want to learn more about integrating the Plank into controller-based systems, reach out—we’re always happy to help fellow reefers dial in their gear.

For a complete, step-by-step guide on programming the Shelly Plug and Plank, including instructional screenshots, please visit our Feeder Support Page: HERE

We've also started an R2R thread on this to continue the discussion. Interested in seeing what others are saying and thinking? Check out our R2R thread HERE.

A Sniff Test into the Avast Labs Ozone Air Scrubber & Water Silencer

Aaron Dus — Wed, 17 Dec 2025 09:48:00 -0500

This blog is not intended to be a deep dive into the use of ozone (O₃) in a reef tank.
We are working on that for 2026.

Ever smelled something sweet, almost metallic, like during a thunderstorm - that’s ozone you’re smelling. For some, it can be picked up right away, while others can’t smell it at all. The same applies when using ozone on a reef tank. Although it's not the same type of ozone (that is, atmospheric ozone), some people are more sensitive to it than others.

You probably already know activated carbon is excellent at removing impurities and dissolved organics from water, but did you know it is also effective at neutralizing ozone (O₃) and returning it to oxygen (O₂) in water and air? This is one of the reasons why we use bituminous activated carbon in our post-carbon chamber.

Yet from time to time, we would receive an email from a customer with a Mutiny, stating that no matter how often they replaced the carbon in their post-carbon filter, they could still detect a faint trace of ozone in the effluent (exhaust) tube. They asked whether there was anything we could do or make to eliminate the faint ozone smell they detected.

Although we did not have a product for them at the time, this genuine question led us down several rabbit holes. We uncovered the influence of Henry’s Law. Let us geek out for a moment. According to Henry’s Law, the solubility of a gas in water increases proportionally with its partial pressure in the gas phase. This means that increasing the pressure of the ozone gas above the liquid increases the driving force for ozone mass transfer. Higher pressure reduces the rise velocity of gas bubbles, thereby increasing residence time in contact chambers. Source: Sander (2015); Langlais et al. (1991).

I bet you’re asking yourself, what does this all mean? This means the pressure and temperature inside the Mutiny Ozone Reactor chambers are slightly higher than those outside, causing any trace amounts of ozone gas that passed through the activated carbon to expand when it encounters ambient air at standard atmospheric pressure. This can occur more frequently if activated carbon pores become clogged with dissolved organics, or among individuals who are more sensitive to ozone odor.

Armed with this knowledge, we set out to better understand how other industries overcome this challenge. We found that many industrial ozone systems (such as the ones municipal water supplies or bottled beverage plants use) incorporate a series of ambient (air) and aqueous (water) post-filtration scrubbers to ensure all the ozone-treated water falls within the legal OSHA guidelines which state ozone levels in the workplace (they don’t reference on a reef tank) should never exceed an average of 0.10 ppm (parts per million) for 8 hours per day exposure. For more information, see the OSHA website HERE.

We also found that no purpose-built ozone air and water scrubbers are available for reef tanks, so we set out to change that. Our goal was to be the first to design and develop an ozone air and water scrubber for those sensitive to ozone or seeking extra safety and redundancy.

The Birth of the Ozone Air Scrubber & Silencer

After several rounds of R&D and beta testing, we launched the Avast Labs Ozone Air Scrubber & Water Silencer for the Mutiny 2.1. Designed with the same problem-solving focus and community-driven development that define Avast Marine and other Avast Labs products, the Air Scrubber & Water Silencer provides an extra safety barrier for those looking to either fine-tune their Mutiny’s performance or who are extra sensitive to ozone.

What Does a Multi-Stage Approach to Ozone Safety Look Like?

Safe ozone application is a multi-stage process. The Mutiny Reactor and the Air Scrubber work in tandem to eliminate ozone in both its dissolved (Aqueous) and gaseous (Ambient) forms, achieving complete neutralization.

Stage 1: Primary Aqueous Neutralization (Post-Carbon Chamber)

The Mutiny Reactor injects ozone into water, then routes that water through a bituminous carbon chamber. This rapidly converts the vast majority of dissolved ozone back to (O2).

Stage 2: Degassing/Pressure Equalization (Mixing Chamber/Silencer)

The effluent is then routed over bio-balls in a partially submerged chamber (the Scrubber body is installed in 4"–12" of sump water). This crucial 'degassing' stage equalizes pressure, causing any final remaining dissolved ozone to fizz out of the water and escape into the air. The safe, degassed water then returns to the tank.

Stage 3: Final Ambient Neutralization (Air Scrubber)

The ozone-laden air from the degassing chamber travels up the path of least resistance. It is routed directly into the Air Scrubber's dry bituminous carbon bed, where it is safely converted into harmless oxygen before exiting. The Scrubber is the only component specifically designed to capture and safely neutralize this final ambient exhaust.

When to Consider the Ozone Air Scrubber & Silencer?

Pairing the reactor with the Ozone Air Scrubber significantly enhances your system's safety and sensory experience. The following chart outlines some of these use cases:

Benefit	Reason WHY
Safety-First Ecosystem	The Scrubber completes the process by handling atmospheric ozone intentionally released during the degassing stage, protecting you, your family, and your pets from trace amounts.
Cleaner, Controlled Venting	Without the Scrubber, the post-carbon effluent line becomes the route for residual ozone. With the Scrubber, this becomes a controlled processing path that reduces emissions to below detectable limits.
Compliance & Redundancy	Experienced reefkeepers emphasize redundancy. The reactor handles aqueous ozone; the scrubber handles atmospheric ozone. Together, they form a complete, redundant safety solution.
Reduced Noise Profile	By stabilizing air/water flow, the integrated silencer provides a dedicated acoustic-dampening stage that reduces turbulence-generated noise, which is essential for tanks located in living areas or offices.

Why Bituminous Activated Carbon Matters

Not all carbon is engineered equally. The Air Scrubber uses bituminous activated carbon, which isn't just better; it’s safer and more efficient. The efficiency of catalytic O3 breakdown depends heavily on pore-size distribution. Bituminous coal-derived carbon offers an appropriate balance of micro- and mesoporosity, delivering a large reactive surface area for rapid, thorough ozone neutralization and durability under prolonged exposure to oxidizing gases. For those with an Ozone Air Scrubber and Silencer already installed, we recommend replacing the carbon every 4–8 weeks if it gets wet, or up to 6-9 months if it stays dry, or immediately if a faint ozone smell is detected. This indicates the carbon is nearly exhausted. For those who want to take the guesswork out of bituminous-activated carbon refills, we offer subscriptions or one-time purchases on our site to help maintain peak performance.

A Solution Tailored to Your Environment

A common question we get is: "If this is so important, why isn't it standard with the Mutiny?"

Every reef setup is different, and we believe in giving our customers the flexibility to choose the level of filtration their environment requires, ensuring you only pay for what you need.

When optional: If your reactor is located in a garage, in a dedicated fish room with high-volume ventilation, or you only run ozone on a limited schedule (such as at night), the standard Mutiny setup is often sufficient.
When worth considering: If your reef tank is in a central living space, a small office, or a bedroom, it delivers the "Gold Standard" peace of mind, ensuring a silent, smell-free experience.

Final Thoughts: Ozone, Scrubbers, & Subscriptions

The Ozone Air Scrubber and Silencer exemplifies Avast Labs’ dedication to addressing real-world challenges through thoughtful design. It completes the ozone safety cycle, allowing reefkeepers to benefit from ozone’s performance advantages without sacrificing indoor air quality and silence.

PSA. Order your Avast Labs Ozone Air Scrubber and Water Silencer today, and don't forget to stock up on our Bituminous Activated Carbon Refills to maintain peak safety performance.

How to Use Apex OSC to Automate Your Plank Feeder

Dan Lichens — Mon, 19 Jan 2026 11:26:00 -0500

A simple guide to reliable, repeatable micro-feeding on your schedule.

Controlling a Plank feeder with an Apex controller doesn’t need to feel like deciphering an ancient tablet. The OSC (Oscillate) command looks mysterious at first glance, but in practice, it’s the most accurate and dependable way to automate micro-feeding if you already own an Apex.

This post breaks the entire process down into two clean parts:

A repeating OSC loop that defines the feeding pattern.
A simple time window that decides when the pattern runs.

That's it. No virtual outlets. No nested logic chains.

Why OSC is Perfect for the Plank

The Plank thrives on consistency, giving tiny, measured micro-doses of food that perfectly mimic wild reef conditions. To achieve that consistency, you want:

Precise run times
Even spacing between feedings
Clean scheduling with no clutter of multiple "feed events."
Reliability—it's either ON or locked OFF

The OSC command excels because it simply repeats the same pattern forever, and the time rule allows you to dictate precisely when that pattern is permitted to run.

The Core Idea

Think of the whole setup like this:

OSC command creates a continuous, repeating feeding pattern.
Time Rule is the gatekeeper that determines when the pattern is active.

Inside the time window, the Plank feeds at your chosen interval. Outside the window, the Apex locks the outlet OFF.

Step-by-Step OSC Programming

Step 1: Pick Your Feeding Window (The Rail)

Decide the block of time during which feeding is permitted.

Example:

Feed between 10:00 (10am) and 22:00 (10pm)

This twelve-hour window is your "rail"—the OSC loop will only ever be active inside it.

Step 2: Decide Your Cycle Length

First, figure out how many minutes are in your window.

12 hours = 720 minutes

Next, decide how many feedings you want in that window.
Let's use 5 feedings for this example.

720 minutes / 5 feedings = 144 minutes per cycle

While 144 minutes works perfectly, many people choose a clean, round number like 150 minutes (2.5 hours) because it's simpler to manage and adjust. This is your Total Cycle Length.

Step 3: Choose Your Run Time

This is the duration the Plank is actually ON during each cycle.

Common choices are: 15 seconds, 30 seconds, or 45 seconds.

We will use 15 seconds (00:15) for this example.

Step 4: Build the OSC Cycle Formula

The Apex uses this format for the OSC command: OSC A/B/C Then ON

Variable	Description	Value for 150-minute Cycle
A	OFF before ON	000:00 (Set to zero to start the ON cycle immediately after the previous long OFF cycle.)
B	ON time	000:15 (15 seconds)
C	OFF after ON	149:45 (The remainder of the cycle)

Calculating the Remainder (C)

150:00 (Total Cycle)

000:15 (ON Time) = 149:45 (OFF Time)

So your completed OSC line is:

OSC 000:00/000:15/149:45 Then ON

Step 5: Add the Time Rail and Safety Commands

You must define the outlet's default state, then add a time rule to fence the OSC command in.

Command	Purpose
Fallback OFF	A crucial safety setting: If the Apex reboots or loses connection, the outlet stays OFF.
Set OFF	The default condition for the outlet, unless overridden by a rule below it.

Now, we add the OSC pattern and the time constraint:

Fallback OFF

Set OFF

OSC 000:00/000:15/149:45 Then ON

If Time 22:00 to 09:59 Then OFF

When the clock is between 22:00 and 09:59, the last line takes precedence, and the outlet is locked OFF.
When the clock is between 10:00 and 21:59, the If Time rule is ignored, and the OSC pattern is allowed to run normally.

That's the entire, reliable system.

Plug-and-Play Examples

Here are a few common feeding schedules ready to copy/paste:

Schedule Goal	Calculation & Code
5 feedings 10 am–10pm (12 hrs) 15-sec run	Total Cycle: 150 min (149:45 OFF time)
	OSC 000:00/000:15/149:45 Then ON
	If Time 22:00 to 09:59 Then OFF
5 feedings 10am–10pm (12 hrs) 45-sec run	Total Cycle: 150 min (149:15 OFF time)
	OSC 000:00/000:45/149:15 Then ON
	If Time 22:00 to 09:59 Then OFF
Every 3 hours 8am–8pm (12 hrs) 20-sec run	Total Cycle: 180 min (179:40 OFF time)
	OSC 000:00/000:20/179:40 Then ON
	If Time 20:00 to 07:59 Then OFF
Hourly micro-feeding Noon–midnight (12 hrs) 10-sec run	Total Cycle: 60 min (059:50 OFF time)
	OSC 000:00/000:10/059:50 Then ON
	If Time 00:00 to 11:59 Then OFF

How to Create Your Own Schedule

Anyone can customize their feeding interval in a few simple steps:

Count the minutes in your desired feeding window.
Divide by how many feedings you want. That number is your Total Cycle Length.
Subtract your desired run time (B value).
The remainder is your OFF time (C value).
Plug your numbers into the OSC 000:00/B/C Then ON line.
Add one If Time line to fence the cycle in.

This setup stays predictable, tidy, and extremely easy to adjust.

Final Thoughts

The Apex OSC command may look like a logic puzzle, but it's just a steady, repeating loop. Once you pair it with a simple time window, you get a clean, reliable schedule that feeds your tank exactly how the Plank was designed to work.

Drop in your numbers, choose your hours, and let Apex handle the rest.

Ozone, Bacteria, and the Microbial Loop. What Really Happens to Dissolved Organics in a Reef Tank

Aaron Dus — Thu, 19 Feb 2026 12:25:00 -0500

A customer recently reached out to us with the following ask: “I’m interested in learning more about this characteristic of ozone mentioned on the Mutiny Ozone Reactor page: 'Coupled with an efficient protein skimmer, ozone can help improve water quality by breaking down large organic molecules into components more suited to skimming or usable by bacteria. Specifically, how ozone breaks down large organic molecules into components more usable by bacteria. Where can I find more information on this function?” Excellent question, Kyle.

It is a great question because most discussions about ozone stop at one statement: it makes the water clearer. Clarity is the visible outcome. The mechanism is carbon chemistry operating inside a closed system. To understand that mechanism further, we need to follow the carbon.

In the ocean, dissolved organic carbon is constantly diluted, mixed, grazed, and transported away. In a reef aquarium, dilution is engineered rather than automatic. Each feeding event increases carbon density within a fixed volume of water. There is no tidal reset. Carbon accumulates unless it is processed biologically and exported mechanically. Marine scientists refer to the total dissolved organic carbon present at any given moment as the DOC pool. The term' pool' simply means a reservoir. It includes coral mucus, fish waste, partially degraded proteins, lipids, carbohydrates, aromatic compounds, and humic-like substances. In a closed system, like our reef tanks, carbon input is intentional. Carbon export must also be intentional. The relevant question is not how much carbon exists, but how efficiently it turns over.

Dissolved organic carbon is chemically diverse. Some compounds are readily metabolized by bacteria. Others are structurally complex and resist breakdown due to aromatic rings, conjugated bonds, and stable carbon frameworks. Over time, especially in mature aquariums, the slower fractions accumulate. You may observe yellowing water, reduced light penetration, skimmer performance that does not reflect feeding intensity, or a gradual decline in redox potential despite adequate aeration. This situation is often described as “high DOC,” but a more accurate term is “slow DOC.” The issue is turnover, not simply concentration. In a closed system, slow-turnover compounds accumulate because there is no large-scale dilution to remove them.

At reef-appropriate dosing levels, ozone does not sterilize the aquarium or convert most carbon into carbon dioxide. It modifies molecular structure. Ozone reacts preferentially with carbon–carbon double bonds, aromatic structures, and other reduced functional groups. Larger organic molecules fragment into smaller intermediates such as aldehydes, ketones, and carboxylic acids. Two structural changes follow. The average molecular size decreases, and the oxygen content increases. The carbon remains present, but it is no longer structurally resistant. Ozone does not directly reduce the size of the DOC reservoir. It alters the distribution of compounds within it, shifting portions toward greater lability. In a closed system, this redistribution affects the rate at which carbon moves through biological pathways.

Ozone also changes oxidation state. When reduced organic compounds accumulate, they increase chemical oxygen demand and suppress redox potential. Partial oxidation of those compounds shifts the balance toward a more oxidized state. ORP increases as a result, but ORP is only an indicator. The underlying change is the ratio between reduced carbon species and oxidized intermediates. That ratio influences microbial respiration, nitrogen transformations, sulfur cycling, and oxygen availability at the coral surface. Ozone changes redox chemistry, not just the ORP reading.

By now, you must be asking, what do the bacteria consume? Once complex dissolved organic matter is fragmented, heterotrophic bacteria gain access to smaller substrates that can enter central metabolic pathways more readily. Low-molecular-weight organic acids and oxidized intermediates move through glycolysis and the tricarboxylic acid cycle. Some carbon is oxidized to carbon dioxide to generate energy. Some become new cellular biomass. Some contribute to extracellular material that promotes aggregation and biofilm stability. The microbial loop is the conversion of dissolved carbon into living microbial mass. In the ocean, that biomass may be transported away or incorporated into food webs. In a reef aquarium, it becomes particulate organic matter that can be removed by skimming. Dissolved carbon is difficult to export mechanically. Microbial biomass is not.

Bacterial growth requires more than carbon. Nitrogen and phosphorus are also necessary for biomass production. When ozone increases, carbon lability and bacterial growth accelerate, and bacteria assimilate ammonium, nitrate, and phosphate into new cellular material. This shifts nutrients from dissolved to biomass-bound forms. In heavily fed aquariums, carbon availability often limits microbial turnover. Increasing carbon accessibility changes how nutrients are partitioned and ultimately exported. In a closed loop, carbon chemistry influences nutrient dynamics.

Around the coral tissue, a thin diffusive boundary layer forms, where water exchange slows. Within that microenvironment, microbial respiration directly affects oxygen concentration at the coral surface. If dissolved carbon accumulates and fuels excessive microbial growth, localized oxygen depletion can occur at night even when bulk oxygen levels appear stable. Carbon availability shapes microbial behavior, and in a closed system, those effects are amplified. Carbon balance, therefore, has ecological implications beyond water clarity.

Protein skimmers remove particulate organic matter and microbial biomass via adsorption at the air–water interface. Ozone enhances export in two ways. Some oxidized organic fragments become more surface-active and adhere to air bubbles more readily. At the same time, bacterial multiplication converts dissolved carbon into particulate biomass.

The sequence is straightforward: Dissolved carbon is conditioned by ozone. Bacteria consume the conditioned carbon. Biomass increases. Skimmers (foam fractionation for our Ozzie friends) remove that biomass. In a closed system, this dissolved-to-particulate conversion accelerates turnover and reduces the accumulation of slow fractions. This is why skimmate often darkens and becomes more consistent when ozone is applied properly.

This often leads to the discussion of concentration versus imbalance. Natural reefs operate at lower dissolved organic carbon concentrations and far greater dilution. Closed aquariums operate at higher carbon loading per liter because feeding is concentrated and there is no dilution. The problem is not elevated DOC alone. It is an imbalance. When carbon input exceeds processing and export capacity, the DOC reservoir shifts toward slower fractions. Microbial respiration patterns adjust. Oxygen demand changes. Turnover slows. The objective is not zero DOC. The objective is sustained flow.

Where Ozone Fits. Ozone is not a strip-the-water solution. When applied intentionally, it functions as a carbon conditioning step within a broader export strategy. It reduces the accumulation of chromophoric compounds, increases the lability of complex DOC, supports microbial turnover, enhances conversion to exportable biomass, and improves foam fractionation efficiency. In a closed marine system, carbon flow does not self-correct. It must be designed. Ozone is one tool for maintaining that design when used responsibly and with appropriate control.

In Summary

Ozone does more than improve clarity. It modifies dissolved carbon chemistry, shifts redox balance, influences microbial metabolism, and supports export in a system without natural dilution. In a closed reef tank, carbon flow must be engineered.

In a reef tank:

Dissolved organic carbon forms a constrained reservoir
Without efficient turnover, slower fractions accumulate
Ozone fragments complex organics into more labile intermediates
Bacteria convert those intermediates into biomass
Protein skimmers export that biomass, completing the carbon cycle

We hope you found this topic interesting. If you have a question, feel free to share it, and you may see it turned into a blog post.

PRODUCT PLUG.
If you'd like to order an Avast Marine Mutiny 2.1, click HERE.

GLOSSARY

Dissolved Organic Carbon (DOC)
Organic carbon compounds are dissolved in aquarium water. These originate from coral mucus, fish waste, uneaten food, and metabolic byproducts. DOC is chemically diverse and constantly changing.

DOC Pool
The total reservoir of dissolved organic carbon present in the system at a given time. The term “pool” refers to the collection of compounds, not a single uniform substance.

Labile DOC
Carbon compounds that bacteria can readily metabolize. These typically include low-molecular-weight organic acids and simple intermediates.

Refractory DOC
Structurally complex organic compounds that resist rapid microbial degradation. Often includes aromatic or highly conjugated molecules that can accumulate in closed systems.

Chromophoric Dissolved Organic Matter (CDOM)
The fraction of dissolved organics that absorbs light, especially in the blue spectrum. Responsible for yellowing water and reduced light penetration.

Microbial Loop
The biological pathway by which dissolved organic carbon is consumed by heterotrophic bacteria and converted into microbial biomass.

Heterotrophic Bacteria
Microorganisms that obtain energy and carbon by consuming organic compounds rather than fixing inorganic carbon.

Lability
A measure of how easily a compound can be metabolized by microbes. Increased lability generally corresponds to faster microbial turnover.

Redox (Oxidation–Reduction State)
The balance between oxidized and reduced chemical species in the water. Influences microbial metabolism, nutrient cycling, and oxygen demand.

ORP (Oxidation-Reduction Potential)
A measurement that reflects the oxidative state of the water. ORP is an indicator of redox balance but does not directly measure ozone concentration.

Chemical Oxygen Demand (COD)
A measure of the amount of oxygen required to oxidize reduced compounds in water. Elevated reduced organic load increases COD.

Diffusive Boundary Layer
A thin layer of water surrounds coral tissue where flow slows, and chemical exchange is limited. Microbial respiration within this layer can influence localized oxygen availability.

References and Further Reading

The concepts described in this article are grounded in marine biogeochemistry and aquaculture research examining dissolved organic matter transformation, ozonation, microbial processing, and foam fractionation.

Gregersen, K. J., et al. (2021). Foam fractionation and ozonation in freshwater recirculation aquaculture systems. Aquacultural Engineering, 93, 102158.

Kovács, B. D., et al. (2023). Evaluating protein skimmer performance in a marine recirculating aquaculture system with ozonation. Aquacultural Engineering, 103, 102381.

Aguilar-Alarcón, P., et al. (2022). Impact of ozone treatment on dissolved organic matter in recirculating aquaculture systems. Water Research, 215, 118263.

Hansell, D. A., & Carlson, C. A. (2015). Biogeochemistry of Marine Dissolved Organic Matter. Academic Press.

Haas, A. F., et al. (2016). Global microbialization of coral reefs. Nature Microbiology.

Does Kalkwasser Strip Trace Elements? No, but...

Dan Lichens — Mon, 18 May 2026 12:59:00 -0400

Does Kalkwasser Strip Trace Elements? No, but...

The Snapshot: Does Kalkwasser Strip Trace Elements? The short answer is no, but it does act as a chemical gatekeeper.

The Myth: Kalkwasser enters the aquarium and removes essential trace elements from the water column.
The Science: In the concentrated environment of a reactor, Kalkwasser causes certain metals and phosphates to precipitate from solution.
The Takeaway: This is a benefit, not a drawback. By leaving the "slurry" in the reactor and dosing only clear effluent, you provide pure calcium and alkalinity support while keeping impurities out of your system.

Kalkwasser does not broadly “strip” trace elements from reef aquarium water. The more useful reframing is this: in a kalk reactor, high-pH limewater can help certain metals, phosphate compounds, and insoluble impurities settle in the slurry rather than being dosed into the reef. Once clear effluent enters the sump, its main job is different. It supports the tank’s carbonate engine by adding calcium, alkalinity, and pH support. The key is not avoiding kalkwasser. The key is to dose clear effluent and leave the slurry where it belongs.

A recurring claim in reefkeeping is that kalkwasser “removes trace elements from the water.” We understand why that statement gets repeated. There is real chemistry behind it. At the same time, the simplified version can lead reefkeepers to the wrong conclusion.

Kalkwasser does not broadly strip all trace elements from a reef aquarium. It can, however, create a very high-pH environment in which certain metals, phosphate compounds, and insoluble impurities may precipitate, bind to mineral surfaces, or settle in the residue at the bottom of a reservoir or reactor.

The most important distinction is location.

A kalk reactor and a reef tank are not the same chemical environment. Inside the Avast K1 or K2, calcium hydroxide interacts with RO/DI water, a very high pH, low ionic complexity, and a contained slurry bed. At the dosing point in the sump, clear kalkwasser effluent enters the aquarium's saltwater at normal reef salinity (1.025), where it is rapidly diluted into a much more complex carbonate system.

Much of the trace-element confusion starts when those two environments are treated as one.

Kalkwasser Is Not a Broad Trace-Element Remover

Kalkwasser is a saturated solution of calcium hydroxide in freshwater. Its primary role is to add calcium and alkalinity in a high-pH form. In practical reefkeeping terms, kalkwasser helps support the carbonate engine: the linked chemistry of calcium, alkalinity, pH, and carbon dioxide that allows corals, coralline algae, clams, and other calcifying organisms to build structure.

It is not designed to replace trace elements. It also should not be described as a universal trace-element removal method.

Trace elements are chemically diverse. Copper, zinc, iron, manganese, iodine, boron, molybdenum, strontium, magnesium, and other minor or trace constituents do not behave the same way in seawater. Some are more prone to precipitation under high-pH conditions. Some bind to carbonate surfaces. Some remain comparatively soluble. Others are consumed biologically, incorporated into skeletons, exported through filtration, or replenished through salt mix, feeding, water changes, and measured supplementation.

The statement “kalk removes trace elements” is too broad to be useful.

A more accurate version is:

At the high pH of kalkwasser, certain metals and impurities may become less soluble, bind to calcium hydroxide or calcium carbonate particles, and settle into the residue. Properly managed kalkwasser dosing can leave more of that material behind while delivering clear saturated limewater to the aquarium.

That is not trace-element stripping. That is controlled separation.

The Reactor Is Not the Reef Tank

This distinction is central to using kalkwasser well.

Location	Water Chemistry	Primary Reactions	Trace-Element Implication
Inside the K1/K2 reactor body	RO/DI water, calcium hydroxide, very high pH, low ionic complexity, contained slurry bed	Calcium hydroxide dissolves; limited CO₂ intrusion forms calcium carbonate; magnesium and some metals may precipitate, adsorb, or coprecipitate into settled solids	This is where Kalkwasser’s “self-purifying” behavior is most relevant. Some impurities can remain in the slurry or residue rather than enter the tank.
At the dosing point in the sump	Aquarium saltwater at normal reef salinity, with bicarbonate, carbonate, magnesium, organics, phosphate, and trace elements already present	Hydroxide is rapidly diluted and reacts with dissolved CO₂ and bicarbonate, becoming part of the tank’s carbonate alkalinity system	Proper clear-effluent dosing should not broadly strip trace elements. Overdosing or slurry dosing can create localized high-pH zones and drive unwanted precipitation.

Inside a K1 or K2, the chemistry is concentrated and contained. Calcium hydroxide dissolves in RO/DI water. Undissolved calcium hydroxide, calcium carbonate residue, and other settled solids remain in the reactor body. This is the zone where limewater’s self-purifying behavior is most relevant.

Randy Holmes-Farley has described limewater as somewhat self-purifying, noting that copper and other metals may not be especially soluble under the high-calcium, high-hydroxide conditions present in limewater. Calcium hydroxide and calcium carbonate particulates may also provide surfaces that bind or remove some metals from solution.

Once clear kalkwasser effluent leaves the reactor and enters the sump, the chemistry changes. The effluent is no longer sitting in a contained RO/DI limewater environment. It is entering the aquarium saltwater. The hydroxide is rapidly diluted and becomes part of the tank’s bicarbonate/carbonate alkalinity system. That is the intended reaction: carbonate support, not broad trace-element removal.

The Slurry Is Chemically Active

The residue at the bottom of a kalkwasser reservoir or reactor is not simply “extra kalk.” It is a chemically active zone that may contain undissolved calcium hydroxide, calcium carbonate residue, magnesium-containing precipitates, phosphate compounds, and impurities that have settled or bound to solids.

That residue should remain in the reactor.

The K1 and K2 are designed to keep undissolved particles at the bottom while clear liquid remains at the top. The stirrer maintains movement in the calcium hydroxide bed without turning the reactor into a slurry doser. That separation is the operating principle.

The reactor is where the slurry belongs.
The sump is where clear effluent becomes carbonate support.

That distinction is mechanical, chemical, and practical.
It is also one of the simplest ways to think about kalkwasser correctly.

Clear Does Not Mean Weak

One of the most common misunderstandings about Kalkwasser is the assumption that cloudy Kalkwasser is stronger than clear Kalkwasser.

That assumption is incorrect. Clear Kalkwasser can be fully saturated. Visible cloudiness reflects suspended or undissolved material, not a more useful calcium and alkalinity solution. The cloudy material can introduce unnecessary risk when dosed directly into the aquarium.

Undissolved calcium hydroxide is extremely basic. If slurry enters the reef system, it can create localized areas of very high pH. Those localized spikes can irritate animals, drive calcium carbonate precipitation, and contribute to the familiar kalkwasser “snowstorm.”

Clear effluent is the controlled fraction.
Slurry is the reactive residue.

This is why we do not recommend modifying a stirrer to dose slurry. Proper fill rates, controlled make-up percentages, measured evaporation, and clear-effluent delivery provide the Kalkwasser benefit without sending aggressive solids downstream.

What the Research Supports

The chemistry behind this concept is not unique to reef aquaria. Research on carbonate chemistry supports the broader mechanism whereby trace metals interact with calcium carbonate surfaces.

Studies have shown that metals such as copper, zinc, cadmium, cobalt, and manganese can adsorb to calcite or aragonite surfaces. Some may also become incorporated through surface precipitation or coprecipitation. These mechanisms are well recognized in marine geochemistry and environmental chemistry.

A reef aquarium is not a laboratory precipitation reactor, so these findings should be applied carefully. Still, the principle is relevant: carbonate minerals and high-pH precipitation environments can influence the solubility and mobility of certain metals. In a Kalkwasser system, which reinforces the value of allowing solids to remain behind.

Magnesium and Strontium Require a Different Explanation

Magnesium and strontium are often folded into the same trace-element conversation, but they are better understood separately.

Holmes-Farley’s work on magnesium and strontium in limewater showed that limewater can be deficient in these ions relative to what calcifying organisms incorporate into skeletons. In the case of magnesium, high-pH limewater makes magnesium poorly soluble, so much of the magnesium present in the starting material may settle rather than remain in the clear limewater. Strontium behaves differently, but limewater may still under-deliver strontium relative to long-term biological demand.

This does not mean Kalkwasser is actively stripping magnesium and strontium from the display, as folklore often implies.

The more accurate interpretation is:

Kalkwasser is highly useful for supporting calcium, alkalinity, and pH, but it is not a complete replacement for minor or trace elements.

A growing reef still requires magnesium monitoring, a high-quality salt mix, appropriate feeding, water changes as part of the husbandry strategy, and measured supplementation when testing indicates it is needed. That is not a weakness of kalkwasser. It is simply understanding the tool. Kalkwasser supports the carbonate engine. It does not replace every input a reef consumes.

The Folklore Resolved

So, does Kalkwasser remove trace elements? The more accurate answer is:

Kalkwasser can immobilize or settle certain metals and impurities under high-pH conditions, especially in the slurry or residue zone inside the reactor. It does not broadly and automatically strip all trace elements from a properly maintained reef aquarium.

That distinction matters.

The beneficial separation happens primarily in the reactor body, where the chemistry is concentrated, the water is RO/DI, and the residue can remain contained. Once clear effluent enters the sump, the Kalkwasser no longer serves as a purification zone. It is functioning as a controlled calcium, alkalinity, and pH-support input. The risk appears when those roles are confused.

Dosing slurry sends aggressive solids and settled residue into the reef system. Dosing clear saturated effluent delivers the intended benefit while leaving more of the unwanted material in the reactor. That is the chemistry behind the clear-effluent approach.

Where the Avast K1 and K2 Fit

The K1 and K2 are designed around controlled kalkwasser delivery. The reactor maintains a slurry bed at the bottom, where calcium hydroxide continues to saturate incoming RODI water. The clear kalkwasser above that bed is the fraction delivered to the reef. This design supports the useful chemistry of kalkwasser while reducing the risk of dosing undissolved solids or settled residue.

Media behavior matters here. Calcium hydroxide used in a stirrer needs to hydrate, mix, settle, and remain workable without clumping into a hard mass or sending excessive solids downstream.

That is why we recommend Original Recipe Kalkwasser for the K1 and K2. After more than a year of bench testing many branded Kalkwasser products, we concluded that Mississippi Lime performed best in our stirrers, maintaining consistent high pH, calcium, and alkalinity saturation, easy mixing, clear saturated effluent, and a non-clumping slurry bed.

K1 and K2 sizing should also be based on daily Kalkwasser usage rather than tank volume alone. The K1 can deliver 2.5 gallons of saturated Kalkwasser per day, while the K2 can deliver 5 gallons per day. The Kalkulator uses measured evaporation and make-up percentage to calculate daily dosing and dry kalk additions over 14- or 30-day intervals.

That is the practical system:

Measured demand.
Appropriate media.
Contained slurry.
Clear effluent.

In Summary

The claim that Kalkwasser removes trace elements is an oversimplification.
A more precise understanding is:

Kalkwasser does not broadly strip trace elements from reef water.
Inside a kalk reactor, high-pH limewater can cause certain metals and impurities to precipitate, adsorb, or settle.
The slurry bed may contain more than unused kalk.
Clear saturated kalkwasser is the fraction intended for dosing.
Once clear effluent enters the sump, its primary role is to support calcium, alkalinity, and pH.
Dosing slurry increases risk and undermines one of Kalkwasser’s built-in advantages.
Kalkwasser does not replace magnesium, strontium, or trace-element management.
Proper use depends on controlled delivery, clear effluent, appropriate media, and measured demand.

Used correctly, kalkwasser is not a trace-element liability. It is a disciplined way to support calcium, alkalinity, pH, and the carbonate engine of a growing reef.

The Takeaway

Kalkwasser deserves a more precise reputation. Its value is not limited to adding calcium and alkalinity. Its value comes from separating two jobs that should remain separate. Inside the reactor, Kalkwasser is made in a controlled, high-pH RO/DI environment where solids, residue, and some impurities can remain contained.

In the reef tank, clear effluent becomes carbonate support: calcium, alkalinity, and pH assistance delivered without intentionally dosing the slurry. That is the difference between simply using kalkwasser and using kalkwasser well.

The K1 and K2 were built around that distinction. They are not slurry dosers. They are clear-effluent kalkwasser reactors designed to separate useful saturated limewater from the material that should stay behind.

Dose the clear effluent. Leave the slurry in the reactor.
Let Kalkwasser support the carbonate engine without turning the sump into the reaction chamber.

Glossary

Kalkwasser

A saturated solution of calcium hydroxide in fresh RODI water is used to supplement calcium and alkalinity in reef aquariums.

Clear Effluent

The clear saturated Kalkwasser is drawn from above the slurry bed in a kalk stirrer. This is the liquid intended for dosing.

Slurry

The settled mixture of undissolved calcium hydroxide, calcium carbonate, and other solids at the bottom of a kalk reactor or reservoir.

Adsorption

A process where dissolved ions or compounds bind to the surface of a solid particle.

Coprecipitation

A process where one substance becomes incorporated into a forming solid as another compound precipitates.

Trace Elements

Elements present at very low concentrations in seawater. They are chemically diverse and do not all behave the same way.

Carbonate Engine

A practical way to describe the calcium, alkalinity, pH, and carbon dioxide chemistry that supports calcification in reef aquariums.

References and Further Reading

Randy Holmes-Farley. “Chemistry and the Aquarium: Metals in Limewater.”
Randy Holmes-Farley. “Aquarium Chemistry: Magnesium and Strontium in Limewater.”
Randy Holmes-Farley. “How a Two-Part Alkalinity and Calcium System Works, and Why It Matters.”
Kitano, Y., Kanamori, N., and Yoshioka, S. “Adsorption of zinc and copper ions on calcite and aragonite and its influence on the transformation of aragonite to calcite.” Geochemical Journal, 1976.
Comans, R. N. J., and Middelburg, J. J. “Sorption of trace metals on calcite: Applicability of the surface precipitation model.” Geochimica et Cosmochimica Acta, 1987.
Davis, J. A., Fuller, C. C., and Cook, A. D. “A model for trace metal sorption processes at the calcite surface.” Geochimica et Cosmochimica Acta, 1987.
Avast Marine Works. K1/K2 Kalk Stirrer.
Avast Marine Works. Original Recipe Kalkwasser.
Avast Marine Works. Kalkulator.

Introducing The Porthole Mark II Modular (MIIM)

Dan Lichens — Wed, 27 May 2026 14:12:00 -0400

For nearly twenty years, the Avast Porthole has had one simple job: to give reefkeepers a clear, top-down view of their aquariums.

That original tube worked well. It helped hobbyists, coral farmers, and photographers cut through surface glare, water ripples, and awkward shooting angles. It was simple and durable, solving a problem every reefer eventually encounters.

However, over the last twenty years, its use has changed entirely.

Our customers began sending us photos and videos that far exceeded our initial expectations. They used the product for commercial livestock sales, daily growth monitoring, social media reels, and professional macro photography. Meanwhile, smartphones became the primary camera for most hobbyists, driving strong demand for a faster, more streamlined way to capture clear shots.

We were hitting the same walls ourselves. The more we used the original Porthole in our own shop for daily reefkeeping and social media, the clearer it became that a cosmetic redesign would not cut it. We needed to rebuild the entire system around how reefkeepers shoot today.

Evolving to meet reefer's needs

The core principle of the original Porthole did not need reinvention. Placing an optical window below the water's surface remains the best way to eliminate reflections and surface distortion.

What needed to change was everything around that window. When we first built the Porthole, serious reef imaging required a dedicated DSLR camera.

Today, much of the most critical tank documentation happens on smartphones. You spot a rare coral with extreme polyp extension, a potential pest, a spawning event, or a frag that needs to go up for sale, and your phone comes out of your pocket immediately.

A smartphone camera does not need the same interface as a heavy DSLR. It needs instant alignment, a clean mounting method, a way to block overhead glare, and a form factor that does not turn a quick photo into a massive production.

Meanwhile, our DSLR and mirrorless users were asking for more robustness. They needed better lens clearance, tighter control of internal stray light, a rock-solid connection, and a way to make the Porthole feel like an integrated extension of their lens rather than a separate box they had to awkwardly hold in place.

Those two distinct workflows pushed our design team in two different directions. The Mark II architecture was built to solve both.

Rebuilt From Real Shop Experience

Every upgrade to the Mark II system came from real-world frustration.

The Creator Mobile Cradle (made for the iPhone at the time of this release) came from watching reefkeepers fumble with universal phone clamps around the water. We knew the mount had to be fast and predictable. By designing the cradle around the MagSafe ecosystem, your phone now snaps into perfectly centered alignment instantly. You attach the phone, place the Porthole in the water, and take the shot.

We also integrated a custom internal light shield into the cradle to eliminate the dreaded overhead LED wash and lens reflection. Anyone who has tried to take a top-down photo knows that overhead aquarium lights reflect directly into the phone lens, washing out color and destroying contrast. The light shield completely blocks ambient glare from hitting the lens.

For the optics, we did not simply make the tube bigger or smaller. We refined the internal light path to a precise 90mm diameter to perfectly match the profiles of modern lenses. This geometry eliminates internal light bounce and maximizes color saturation.

Real Filters for Real Colors

One of the most practical upgrades to the Creator system is the addition of a bonded aluminum 52mm internal filter thread.

Reef lighting looks incredible to the human eye, but completely confuses camera sensors. We wanted to eliminate the terrible blue wash in smartphone photos without forcing people to rely on clumsy clip-ons or heavy digital editing.

By using a standard 52mm photography thread, you can now drop a true 16,000k color-correction filter, a neutral-density filter, or a polarizer directly into the dry chamber. You get true-to-life color saturation directly on your phone's sensor before you ever hit the record button.

Moving From a Tool to an Ecosystem

The real breakthrough of the Avast Marine Porthole Mark II generation is that it is no longer just a standalone product. It is a fully unified, modular ecosystem centered around our heavy-duty 100mm threading.

The Lower Lens Assembly is the shared wet side foundation. From there, you build the setup that matches your specific workflow.

Porthole Studio: Built for DSLR and mirrorless users who need a stable, controlled platform. It features axial soft nylon thumbscrews with embedded hex nuts for a non-slip grip that will not scratch your lens barrel. It provides the rigidity required for high-resolution macro capture.

Porthole Creator: Built for the mobile workflow. It gives you the MagSafe alignment cradle, the 52mm filter integration, and built-in rigging points for handles or tripods. It even works as a dual-purpose tool. You can unscrew the lower lens assembly and use the cradle directly against your front tank glass to shoot head-on while completely eliminating room reflections and blue wash.

MIIM Prime Interface: Built for dedicated macro shooters. It bypasses universal clamps and threads directly onto the front of your lens, creating a perfect 12-inch sensor-to-acrylic distance. This unique engineering leaves your manual focus and zoom rings completely accessible for critical macro adjustments.

The Next Generation of Reef Imaging

We can now achieve this thanks to the evolution of our manufacturing capabilities. Modern techniques enable us to produce highly complex, precise internal geometries and tighter modular connections that were impossible two decades ago.

The heart of the Porthole remains exactly the same. It is still a premium window designed to help you see and document your aquarium without water getting in the way. But the system built around that window is entirely new.

Whether you are tracking long-term coral growth for husbandry diagnostics, filming social content, or capturing publication-grade macro shots, the Avast Marine Porthole Mark II family is built for how you shoot.

This Is Just the Beginning

As the Avast Marine Porthole Mark II system rolls out, reef photography will become a much bigger focus for us.

That means more practical education on phone settings, filter use, shooting angles, macro setup, video workflows, and simple ways to get better photos without turning your tank into a studio.

It also means sharing more of what reefkeepers are creating with the system: customer photos, behind-the-scenes examples, social media features, Reef2Reef Photo of the Month content, and real-world shooting notes from tanks that use it.

The next step is not just building better tools; it is helping reefkeepers use them.

Kalkwasser as Your Carbonate Engine. A Cleaner Approach to Modern Reefing.

Dan Lichens — Fri, 05 Jun 2026 12:55:00 -0400

Kalkwasser is often viewed as a legacy method, but it remains one of the cleanest and most effective ways to power a modern reef. Rather than just "chasing numbers," Kalkwasser supports the carbonate engine (the linked chemistry of calcium, alkalinity, and pH) without the ionic buildup associated with other dosing methods.

Cleaner Growth: Kalkwasser is "ionically quiet," adding calcium and alkalinity without increasing sodium chloride levels over time.
pH Support: By neutralizing CO₂, it creates a more favorable environment for rapid coral calcification.
The Reactor Advantage: A proper stirrer allows you to dose a clear, saturated effluent while containing the chemically aggressive slurry.

The Bottom Line: Use Kalkwasser as your primary baseline for calcium and alkalinity. It simplifies your chemistry, stabilizes your pH, and allows for cleaner, more sustainable reef growth.

A question we often get asked

“I know kalkwasser helps maintain calcium, alkalinity, and pH, but is it still worth using on a modern reef tank with so many dosing options available?”

Excellent question. Kalkwasser has been part of reefkeeping for decades, so it is easy to treat it as an old method that has survived mostly by habit. That undersells what it actually does. Kalkwasser remains one of the cleanest ways to support a growing reef, especially when the goal is not only to maintain calcium and alkalinity levels but also to maintain the carbonate chemistry that supports skeletal growth.

A reef tank is a closed system. Calcium and alkalinity are consumed every day by corals, coralline algae, clams, and other calcifying organisms. In a mature reef, that consumption is not incidental. It is structural. Every new coral branch, every encrusting edge, every patch of coralline algae, and every shell layer represents chemistry becoming reef mass.

That process is the carbonate engine.
Kalkwasser is one of the simplest ways to keep that engine running.

The Carbonate Engine

In reefkeeping, calcium and alkalinity are often treated as two separate test results. In the tank, they are part of the same growth pathway.

Calcifying organisms use calcium and carbonate chemistry to build a calcium carbonate skeleton. Reefkeepers usually first see this demand in alkalinity consumption. A growing reef may test stable for a while, then begin pulling alkalinity down faster as coral mass increases. That is not a random shift; it is the reef accelerating.

Kalkwasser, or limewater, is calcium hydroxide dissolved in freshwater. When it enters seawater, it contributes calcium and hydroxide. The calcium supports skeletal formation. The hydroxide enters the carbonate system, supporting alkalinity and helping neutralize some of the carbon dioxide pressure that often suppresses pH in indoor aquariums.

The result is not just the addition of calcium. It is carbonate support.

That distinction matters. A reef does not grow from isolated numbers. It grows from chemistry, moving through a system at the right rate, in the right form, with the least unnecessary baggage.

pH Is Not Just a Graph

pH is easy to oversimplify. Some reefkeepers chase it. Others ignore it. Neither approach is ideal; pH is part of the carbonate environment surrounding coral tissue. Many modern homes have elevated indoor carbon dioxide levels, especially when windows are closed, HVAC systems are efficient, and occupancy is high. That carbon dioxide dissolves into aquarium water, shifting the carbonate system toward lower pH.

A reef can survive at a lower pH. Many do. The more useful question is whether the system is working harder than it needs to. Kalkwasser helps by adding alkalinity in a high-pH form. It does not simply raise a number on a controller. It helps counter some of the acidifying pressure created by carbon dioxide. When applied steadily and responsibly, Kalkwasser can move the tank toward a more favorable carbonate environment for calcification. The keyword is responsibly.

Kalkwasser is powerful. It should be dosed slowly, based on measured evaporation and alkalinity demand. pH improvement is one of its benefits, but pH should not be the only control point. Alkalinity still tells the more important story.

Ionic Balance and Cleaner Growth

Two-part dosing works. Calcium reactors work. Many beautiful reefs use both. Kalkwasser has a different advantage. It is ionically quiet.

Many two-part systems add calcium and alkalinity using calcium chloride and sources of sodium carbonate or bicarbonate. Those additions can leave sodium and chloride behind over time. Randy Holmes-Farley has written that adding 1 dKH of alkalinity per day, with balanced calcium addition, can add sodium and chloride, resulting in an estimated 0.63 ppt salinity increase per month before correction.

That does not make two-part wrong. It does mean heavy two-part use is not chemically invisible.

Kalkwasser adds calcium and alkalinity without introducing the same sodium chloride residue. In a growing reef, Kalkwasser is especially valuable as the baseline method. Let Kalkwasser carry as much of the daily calcium and alkalinity demand as evaporation safely allows. Use two-part, a calcium reactor, or another method for the remaining demand if the reef outgrows Kalkwasser alone. That is the cleaner growth strategy. Kalkwasser first. Complexity only where the reef actually requires it.

Purity Matters. Behavior Matters More Than Most People Think.

Calcium hydroxide is not just a powder once it enters a Kalk stirrer. It becomes a working slurry.

That slurry has to hydrate, suspend, settle, and remain usable over time. It has to remain saturated without forming a hard mass at the bottom of the reactor. It has to support clear effluent rather than push solids into the aquarium. This is where product choice matters.

We started using Mississippi Lime in 2008 and designed our stirrers around its performance and mixing characteristics. After more than a year of bench testing many branded Kalkwasser products, we concluded that no other calcium hydroxide is better for our stirrers. It maintains a consistently high pH, calcium, and alkalinity saturation, mixes easily, reliably delivers clear saturated effluent, and forms a non-clumping slurry at the bottom of the stirrer.

That last point is not a detail. It is the system.

Some pharma-style Kalk products are very high in purity, but that does not automatically make them the best choice for every reactor. We have tested high-quality Kalk that did not work well in our stirrers. In our testing, some products were significantly denser than normal calcium hydroxide, clumped, turned solid, and applied unnecessary torque to the stirrer motors.

The practical takeaway is straightforward: For a Kalk stirrer, purity is only one part of overall performance. The media also has to behave properly inside the reactor.

Clear Effluent Is the Point

One of the most persistent misunderstandings about Kalkwasser is the idea that the cloudy slurry is somehow stronger or better. It is not.

Clear Kalkwasser can be fully saturated. The clear liquid above the settled Kalk is the part we want entering the aquarium. The settled material at the bottom is the working reserve bed. It helps replenish the solution as freshwater moves through the stirrer, but it is not meant to be dosed into the reef. The K1 and K2 are designed around that separation.

Our motor-driven stirrer gently mixes calcium hydroxide 24 hours a day. Undissolved particles stay at the bottom, while clear liquid remains at the top. That design allows the reactor to dose clear Kalkwasser rather than slurry, which we consider the safest way to deliver Kalkwasser to a reef tank.

Slurry dosing carries a different risk profile. Undissolved calcium hydroxide is extremely basic. When solids enter the aquarium, they can create localized zones of very high pH, promoting precipitation. The result can be instability, irritation, or the familiar Kalkwasser “snowstorm.” Clear effluent is controlled. Slurry is not.

The Slurry Is Also a Trap

There is another reason to keep the settled material inside the reactor. At the high pH of limewater, some unwanted materials are less likely to remain dissolved. Holmes-Farley has described limewater as somewhat self-purifying for copper and other metals under the high-calcium, high-hydroxide conditions present in limewater, with particulates such as calcium hydroxide and calcium carbonate helping bind or remove some metals from solution.

That does not mean Kalkwasser eliminates every impurity. It means the settled material can become more than unused Kalk. It may also contain calcium carbonate residue, precipitated impurities, and other material better left behind. This is one of the strongest arguments for dosing clear effluent.

The goal is not to stir everything into a milkshake and send it downstream. The goal is to maintain an active slurry bed at the bottom of the stirrer, allow the solution to saturate, and dose the clear Kalkwasser from above. That is the chemistry behind the mechanical design.

Does Saturated Kalkwasser Stay Effective?

Another common assumption is that Kalkwasser loses strength almost immediately after mixing. The more accurate answer is: it depends on exposure, agitation, and the amount of remaining usable calcium hydroxide.

Kalkwasser reacts with carbon dioxide from the air. That reaction forms calcium carbonate, which no longer contributes the same calcium hydroxide potency. Open, agitated reservoirs lose strength faster than covered, still reservoirs. Time matters, but air contact and mixing behavior matter more.

In a stirrer, the question becomes practical rather than theoretical: how long can the reactor maintain useful output under real operating conditions?

That is why we built the Kalkulator around measured evaporation, make-up percentage, and actual dry Kalk additions for 14-day or 30-day intervals. We also bench-tested output using lab-grade pH equipment. In our testing, pH was more stable when Kalk powder was measured carefully and added every two weeks. Thirty-day additions can still provide benefit, especially with Mississippi Lime, which measured pH 11.75 at day 24 in our tests, but 14-day additions were more consistent.

This is an important distinction. The K1/K2 is not built on the idea that all mixed Kalkwasser instantly fails. It is built on control. Controlled media behavior. Controlled saturation. Controlled clear effluent. Controlled refill intervals. Controlled dosing based on actual evaporation and demand.

Where the K1 and K2 Fit

A Kalk stirrer should not be sized by ego. It should be sized by daily Kalkwasser demand. A lightly stocked large tank may need less Kalkwasser than a smaller reef packed with fast-growing SPS. A dry house may evaporate more than a humid room. A covered aquarium may have less Kalkwasser capacity than an open-top system with fans. Tank size matters, but daily usage matters more.

The K1 can deliver 2.5 gallons of saturated Kalkwasser per day. The K2 can deliver 5 gallons per day. We offer tank ratings from experience, but daily Kalkwasser usage is the deciding factor.

That is why the Kalkulator begins with evaporation. Measure how much water your system actually loses over a few days to a week. Decide what percentage of that evaporation you want to replace with Kalkwasser. Then use that number to determine the correct dry Kalk addition for the refill interval you want to run.

For new Kalk users, we generally recommend starting conservatively and increasing slowly. A tank with low demand does not need to run at the edge. A high-growth SPS system may eventually rely on a very high percentage of evaporation via Kalkwasser. As pH improves and calcification accelerates, demand for calcium and alkalinity may rise.

That is not a flaw in Kalkwasser. That is the carbonate engine responding.

Kalkwasser Reappreciated

Kalkwasser does not need to be reinvented. It needs to be respected. For years, Kalkwasser has been treated as the simple option. In some ways, it is. Calcium hydroxide, freshwater, slow dosing. That simplicity is part of its strength, but simple does not mean unsophisticated.

In a modern reef tank, Kalkwasser can serve as the first layer of a cleaner calcium-and-alkalinity strategy. It supports the carbonate engine, improves pH, reduces the need for heavier two-part dosing, and prevents unnecessary accumulation of sodium chloride. When delivered as clear effluent through a properly designed stirrer, it also keeps the aggressive slurry and potential residue where they belong. Inside the reactor. Not in the reef.

The K1 and K2 exist for that reason. They are not just containers for Kalk. They are controlled-delivery systems built around the details that make Kalkwasser work well: constant, gentle motion; clear, saturated effluent; non-clumping media behavior; easy refills; and sizing based on real daily demand.

That is the reappreciation Kalkwasser deserves. Not as an old-school shortcut. As a disciplined carbonate engine for cleaner reef growth.

In Summary

Kalkwasser remains one of the most useful tools for maintaining a growing reef when it is applied with control.

In a reef tank:

Calcium and alkalinity consumption reflect real skeletal growth.
Kalkwasser supports the carbonate engine by adding calcium and alkalinity in a high-pH form.
pH support is not just a graph improvement. It reflects a more favorable carbonate environment.
Kalkwasser can reduce reliance on heavy two-part dosing and the sodium-chloride residue that comes with it.
Clear effluent can be fully saturated and is the part we want entering the aquarium.
The settled slurry belongs in the reactor, where it serves as reserve media and may help trap unwanted residue.
Media choice matters. The best Kalk for a stirrer is not only clean; it must hydrate, mix, settle, and remain workable.
The K1 and K2 are built to deliver Kalkwasser as a controlled system, not a chemistry gamble.

Used correctly, Kalkwasser is not a throwback. It is one of the cleanest ways to support modern reef growth.

PRODUCT PLUG.

If you would like to put Kalkwasser to work on your system, explore the Avast Marine K1 and K2 Kalk Stirrers, Original Recipe Kalkwasser, and Kalkulator. Dose clear. Keep the slurry where it belongs. Let your reef’s carbonate engine run cleaner.

Glossary

Kalkwasser

A saturated solution of calcium hydroxide in fresh RODI water, also known as limewater. It is used to supplement calcium and alkalinity in reef aquariums.

Calcium Hydroxide

The dry compound used to make Kalkwasser. When dissolved in freshwater, it releases calcium and hydroxide ions.

Carbonate Engine

A practical way to describe the linked calcium, alkalinity, pH, and carbon dioxide chemistry that supports calcification in a reef aquarium.

Alkalinity

A measure of the water’s ability to neutralize acid. In reef aquariums, alkalinity is closely tied to the availability of bicarbonate and carbonate for calcification.

Calcification

The biological process by which corals, coralline algae, clams, and other organisms build a calcium carbonate skeleton or shell material.

Clear Effluent

The clear, saturated Kalkwasser is drawn from the upper portion of a Kalk stirrer. This is the liquid intended for dosing into the aquarium.

Slurry

The settled mixture of undissolved calcium hydroxide, calcium carbonate residue, and other solids at the bottom of a Kalk reactor or reservoir. In a K1/K2, the slurry is meant to remain in the reactor.

Saturation

The point at which water has dissolved as much calcium hydroxide as it can under the given conditions. Fully saturated Kalkwasser can still appear clear.

Sodium-Chloride Residue

Sodium and chloride are left behind by many two-part dosing systems after calcium and alkalinity have been consumed. Over time, this can contribute to salinity and ion-balance management.

Make-Up Percentage

The percentage of daily evaporated water replaced with Kalkwasser. This is one of the core inputs in the Avast Kalkulator.

References and Further Reading

The concepts in this article are grounded in reef chemistry, applied Kalkwasser testing, and Avast Marine’s long-term experience designing Kalk stirrers for controlled, clear effluent dosing.

Avast Marine Works. Original Recipe Kalkwasser.
Avast Marine Works. K1/K2 Kalk Stirrer product specifications.
Avast Marine Works. Kalkulator and Kalkwasser testing notes.
Holmes-Farley, R. Chemistry and the Aquarium: Metals in Limewater.
Holmes-Farley, R. How a Two-Part Alkalinity and Calcium System Works, and Why it Matters.
Holmes-Farley, R. A Homemade Two-Part Calcium and Alkalinity Additive System.

Avast Labs Is Now on Printables

Dan Lichens — Fri, 24 Jul 2026 12:03:00 -0400

We are excited to share that Avast Labs is now officially on Printables with a verified account. You can find our page HERE or at https://www.printables.com/@AvastLabs.

This is a natural next step for us. Avast has always lived at the intersection of reefing, fabrication, problem-solving, and a little pirate-style experimentation. Over the years, 3D printing has become an increasingly important part of how we work, not just as a prototyping tool but as a real part of our manufacturing process. What started as a way to test ideas faster has grown into a core part of how we design, build, refine, and support products here in our own facility.

Our print farm works alongside our traditional machining, CNC, and fabrication equipment every day. In other words, this is not a side hobby for us. It is part of the real engine behind how we bring ideas to life. Some printed parts go directly into products, some help us fixture or improve production, and some open the door to concepts that simply would not make sense to machine the old way. The ability to move quickly, test aggressively, and improve constantly is a huge part of what keeps Avast Labs moving.

That same mindset is exactly why Printables makes sense for us.

We did not want this page to be just another place to dump a few files and forget about them. Our goal is to build a useful, growing library that supports modern reefing in practical, creative, and accessible ways. We are starting with a few early listings, but this is only the beginning. Over time, we plan to add more replacement parts, accessories, fun kits, and experimental ideas that support both our products and the reefing community as a whole.

Some of these files will be simple and utilitarian. A replacement part that keeps a product working. A small accessory that makes a setup cleaner or easier to use. A bracket, adapter, or improvement that solves a real problem at home. Others may be more experimental. That is part of what Avast Labs is all about. Not every idea needs to fit neatly into a retail box on day one. Sometimes the best ideas start as a small file, a remix, or a community-driven improvement.

That is also one of the most exciting parts of being on Printables. Reefers are tinkerers by nature. Every tank is a little different. Every stand, sump, controller board, feeding routine, or maintenance process has its own quirks. 3D printing gives hobbyists the ability to customize their systems in ways that were almost impossible a decade ago. Instead of waiting for a manufacturer to offer the exact thing you need, you can adapt, improve, repair, and personalize your setup in real time.

We believe that is a big part of the future of reefing.

Modern reefing encompasses more than just lights, pumps, and controllers. It emphasizes flexibility, repairability, and empowering users with greater control over their home systems. Products should not end at purchase but continue to improve through support, accessories, updates, and community involvement. Therefore, this page is more than a simple file library; it reflects a broader commitment to how reef products integrate seamlessly into modern households.

This approach involves several key principles:

- Providing official replacement parts when appropriate
- Sharing useful accessories and upgrades to enhance existing products
- Encouraging creative projects beyond our standard catalog
- Recognizing that some of the best ideas originate from the community

As this page grows, we hope it becomes a place where reefers can find not only official files from Avast Labs but also inspiration for how 3D printing can be part of their reefkeeping workflow. Whether that means a simple accessory, a clever remix, or a totally new idea, we want this to be a living extension of the inventive spirit that has always driven our work.

We are proud to be building in the USA. We are proud to be using 3D printing as a real production tool. And we are proud to be taking another step toward a more flexible, modern, and community-supported future for reefing.

We have just a few listings up now, but we plan to keep adding to the page over time. More replacement parts. More accessories. More fun kits. More little ideas that make reefing easier, more customizable, and a bit more pirate.

You can follow the page here and keep an eye on new uploads as they go live on https://www.printables.com/@AvastLabs

Thanks for following along!
Team Avast
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