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

The Plank Automatic Feeder

13 reviews
$ 199.00


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

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 3.25". Longer Plank with 5" 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.

The auto feeder is designed to accommodate up to a 3/8" thick screen top between the Plank platform and the Feeder body.

Customer Reviews
5.0 Based on 13 Reviews
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United States United States
You fish will thank you

Works very well. Long ago had an Eheim feeder, and just switched from the AFS feeder. My Anthias love the dehydrated Mysis and Calanus, all my fish go into a feeding frenzy. I have it just sitting on my eurobrace. Tank has a 45 degree corner overflow. The weight of the feeder holds the plank in place.

Avast Marine Works The Plank Automatic Feeder Review
Ryan C.
United States United States
The best auto feeder out there. Period.

Having used a few auto feeders in the past this is hands down the best one ever developed.

United States United States
Best particulate feeder on the market PERIOD!

This is one awesome feeder. The amount fed is super consistent and can be adjusted to extremely small quantities The motor running the Plank is virtually silent, the mixing pump is super quiet. Foods dispense into a mixing chamber that prevents powdered/dehydrated/freeze-dried foods from being ****** into the overflow because they stuck to the surface tension You can mix a variety of smaller powdered foods and pellets. Its not good at dispensing flake foods but it wasn't designed for flake foods. The only real downfall is the long lead time. But its well worth the wait.

Vinh S.
United States United States

Best autofeeder on market. Been in the hobby 16+ years and tried many different brands. Nobody tops this one. Keep up the great work and keep innovating. =)

Frank S.
United States United States

They really hit it out of the park with this one. Finally, something new and original for automatically feeding your fish and corals that actually makes sense and works. And to use an additive rather than subtractive manufacturing process proves that Avast Marine is always on the cutting edge.