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The Plank Automatic Feeder
The Plank Automatic Feeder
The Plank Automatic Feeder
The Plank Automatic Feeder

The Plank Automatic Feeder

158 reviews
$ 209.00

**Version 3.5 with new Sicce mixing pump in stock and shipping now**

Dosing System for Plankton

The Plank automatic feeder represents years of our efforts to find and build a device that both serves the needs of our most delicate and selective aquarium inhabitants as well as our ability to realistically attend to their well-being.  Many reef fish and most corals have evolved to continuously eat small prey items out of the water column.  However, as aquarists, it is usually not feasible for us to administer a continuous, low-density supply of small, nutritious food items in our rapidly and heavily filtered reef aquaria.  This would mean adding small doses of thawed plankton by hand, dozens of times per day; those of us with jobs and a life know this isn’t practical.

Automate frequent, small feedings as often as you’d like

Precise feeding amounts

The Plank is specifically designed to allow this type of frequent micro-feeding technique.  We’ve found over years of testing that freeze dried plankton, from tiny rotifers and calanoid copepods to larger mysis and Euphasia sp. shrimp, serve as an excellent alternative to live and frozen food options.  Freeze-dried food is nutritionally complete, often even better than many frozen preparations.  However, it has often been difficult to administer to the typical reef aquarium due to its tendency to float for a long time after being added to water.  Even with a simple floating feeding ring, freeze dried food particles usually find their way to the surface and into an overflow box, only to be filtered out before being consumed.  Our system solves this problem by incorporating a powered mixing chamber that forces most of the food particles to become neutrally buoyant before being allowed to escape.  This results in a nearly continuous supply of freshly hydrated plankton in the water column. 


Many small high-energy reef fish such as anthias and wrasses, along with juveniles of basically every species, have low capacity, rapid digestive systems.  Once or twice per day blasts of even the highest quality frozen food often isn’t enough for them.  If the answer is continuous availability, the question becomes, how do we achieve this without sacrificing water quality by adding too much food?  In our years of searching, the automatic feeding devices out there didn’t have suitable control of either the frequency or amount of food dispensed, or both.  The common design we have all seen is the tumbling drum that dumps a pile of food into the water out of a flimsy sliding gate that always seems to move itself if you even breathe on it.  Some only offer a few feeding times per day, and if the batteries run out, you have to remember how to reprogram it with the awkward buttons.  Yes, we have a shelf full of these devices collecting dust.


Safe and Reliable

Slow dosing mechanism prevents accidentally adding large quantities of food

Silent, long lasting AC motor

New for version 3.5! Sicce Syncra Nano mixing pump.  Quieter and more reliable with 3 year warranty from Sicce USA.  Existing Plank customers: upgrade here!

Easy to service design

The Plank uses a precise auger driven mechanism that is capable of dosing micrograms of freeze dried plankton at a time.  Rather than complicate our device with yet another hard to remember programming interface, we opted to offload this to well known control systems like your chosen aquarium controller, a ubiquitous digital timer, or an inexpensive wifi-enabled, smartphone controlled power adapter.  Simply set the timer to run for as many seconds or minutes as you see fit, and let the Plank keep your aquarium continuously fed.  You’ll see your fish behave more as they would on a wild reef, a continuous feeding environment, having brighter colors and vigorous activity.

Technical Specs 

Overall Length: Feeder 5.75", Feeder sitting on Plank 7.25"

Height above aquarium rim: 5"

Clamp width: 1/8" to 2-7/8" (3mm-73mm). Longer Plank with 5" (127mm) clamp width available upon request- just note it with your order that you'd like the XL Plank.

Mixing chamber tube: 6" long, 2.375" outer diameter. This can be detached and cut as needed to optimize appearance and performance for your needs. As shipped, it assumes water level approximately 1" below aquarium rim.  A longer custom-length tube is available here.

Looking for a simple, seconds-level resolution wall timer?  We've found this one (search: "Nearpow Timer") or this one (search: "Techbee Timer") works well, even if the initial programming is a bit confusing.  Want to add simple wifi control to the feeder and mixing pump independently?  These dual adapters (search: "Avatar wifi smart plug") allow you to plug the above-linked timer into one half and the mixing pump into the other. This way, you can override the timer with basic on/off, plus let the mixing pump run on a separate schedule if you don't want to leave it running 24/7.

Assembly/installation guide and other tips


Customer Reviews
5.0 Based on 146 Reviews
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Brad D.
United States

Big difference in mixed reef

Amazing product and my LPS and especially anthias love it!

Tim E.
United States United States

Plank Automatic Feeder

I purchased this item for having a reliable feeding time for my saltwater reef/fish tank. The Plank feeder works great and will feed different sized food with consistency. The link to the instruction video has steps for easy setup. Avast provided prompt and courteous replies to order status and offered assistance if any questions occurred during setup. Keep up the great work!

Eric C.
United States United States

Well Built and easy to use

Just put this on my 180 mixed reef a few weeks ago and love it! I program it with my Apex and feed the tank 3 times a day for 2 minutes each. All fish are happy and healthy. Highly recommend!

Avast Marine Works The Plank Automatic Feeder Review
Jasen T.
United States United States

Walked the Plank!

The plank has been installed for about two weeks now and it works great. I installed it using velcro due to my acrylic tank having 7" wide supports around the top, this has worked great. The canister holds a ton of food and I am running the drum motor and pump off of my apex programmed to come on three times a day. I feel pretty good that my fish will be fed when I am anyway on vacation.

James M.
United States United States

The Plank Auto Feeder is just what I wanted!

This is a well-constructed feeder. What I especially like is that it is perfect for a Controller. Since it powers on when plugged in, it needs to be used with a Timer or Controller. With my GHL Controller I can set it to run for just 20 seconds at a time, as many times a day that I want! It is the second one I purchased, one for each of my tanks.