Your cart
Spyglass Reactor Kit
Spyglass Reactor Kit
Spyglass Reactor Kit
Spyglass Reactor Kit
Spyglass Reactor Kit

Spyglass Reactor Kit

18 reviews
$ 119.99


The newest reactor from Avast Marine now available as a DIY Kit! 

We have worked for quite some time to develop the most comprehensive media reactor feature set.  Combining gentle and complete fluidization, recirculating or single pass configuration options, media versatility, exceptional energy efficiency, and easy and quick maintenance into a design that is simply beautiful to watch, we present the Spyglass fluidized cone reactors.



The elegant and silent waterfall design eliminates the need for piping and fittings, yielding a footprint that will fit nicely in the smallest areas of your sump.  The Spyglass is for internal use only and can be used with a variety of media.  From the lightest resin type media like Purigen, to small pelleted Rox 0.8 carbon and GFO all the way up to the heaviest All in One Biopellets, we include a variety of mesh screens to ensure you have everything required to use virtually all media on the market today.  Additionally, we include the parts you need to configure this reactor as a single pass or recirculating chamber.  Simply choose one of three reactor sizes and corresponding optional Sicce pump.  If you prefer to use an external feed from an overflow or tee from an existing pump, this is easily done with parts included with every Spyglass.



The steep cone on the bottom enables complete fluidization using the smallest and most energy efficient pumps on the market.  This translates to less heat in your sump and fewer kilowatt-hours on your monthly utility bill. 



The way the reactor is effortlessly serviced will be appreciated by everyone.  There are no thumbscrews, no tubing and not even a union.  The reactor simply lifts off the base and the media screen is held in place with a press fit o-ring inside the reactor.  No need to even unplug anything; you can lift the Spyglass chamber right off with the pump running! No significant amount of media is lost out the bottom due to our custom made weighted silicone ball and optional fine mesh that sits in the bottom of the cone.  This acts as a check valve of sorts and effectively retains media with minimal cleaning. Changing out media has never been so hassle free!  We've also created a special rinsing lid that makes a quick job of flushing out carbon or GFO before use.

Building the kit

Spyglass Instruction Manual

Note that the pictures show the optional Sicce pump, but the reactors do not include one by default. 

*As of 2020 the rubber ball is no longer supplied nor needed.  Follow instructions for using one of the bottom screens depending on media choice. 


Customer Reviews
4.8 Based on 18 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Daniel T.
United States United States
Works great

The sponge in the upflow reactors clogged within a day and would prevent the media from fluidizing. This reactor Fixed that issue and is working great.

Anibal P.
United States United States
Great design

Avast continues to put out fantastic products as I’ve added this to the already owned swabbie, plank, sea bones, kalk stirrer and Davy Jones products. Will continue to buy great products from Avast.

Charles D.
United States United States
So perfect I bought a second one!

Love this reactor kit. I like the fact that it's available as a you build item. It's fun to do and saves a few bucks! Reactor works perfect. Can run just about any type of media and also different recirculating modes. Very small footprint and extremely easy to maintain. Customer support is also outstanding! Very quick to reply and willing to help answer questions.

Brian J.
United States United States
Easy & Simple

Avast is an amazing company! The Spyglass was easy to built and a simple design. Does the trick and glad I bought it.

Wayne M.
United States United States
Spyglass Reactor DIY Kit

Very nice product, very easy to put together.