Aquarium Co-Op Coarse Sponge Filter with Easy Flow Kit

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  • Air collar makes smaller bubbles for improved performance
  • Easy Flow accessory increases water circulation
  • Coarse, anti-clogging sponge
  • Weighted base sinks instantly and helps prevent floating

Sponge filters offer reliability and hassle-free operation. With no moving parts, all you need is an air pump with some airline tubing, and you've got a filter that is fully contained within your aquarium.  Sponge filters are completely reusable, don't need any replacement cartridges, and last for several years. Plus, they are gentle enough for betta fish, baby fry, shrimp, and other slow-moving species. Trusted by fish farms and wholesalers, they are an excellent choice for aquarium filtration that you can set and forget.

To optimize the sponge filter’s performance, we’ve included an air collar that replaces the need for an air stone and minimizes bubbles coming out of the side of the sponge. The air collar produces smaller bubbles that lessen noise and create more continuous current. If you need greater water circulation, use the included Easy Flow accessory that curves the uplift tube so that water flows out of the sponge filter horizontally across the water surface and around the aquarium.

The Aquarium Co-Op sponge filter is designed using coarse foam so that it can go many weeks between cleanings. The weighted base will immediately sink to the bottom of your aquarium, so no more floating up after a water change or initial installation. Also, the green plastic helps hide algae and blend in with your live aquarium plants.

Customer Reviews

Based on 2471 reviews
chanpheng x. (El Paso, TX, US)

Aquarium Co-Op Coarse Sponge Filter with Easy Flow Kit

mackenzie l. (Rochester, NY, US)
My first success with a sponge filter

I decided to give sponge filters a try a couple of months ago and went right to Amazon and picked a couple out. They were disappointing but my internet wanderings looking for advice and how too videos led me to aquarium co-op. The small for my 10 gallon and nano for my five gallon are seeding and are already looking to be the correct choice. I put air stones in them both as suggested and there is a nice fine bubble stream and gentle flow around my tanks. The course sponge is much easier to maintain and the weighted base keeps it where I want it. I'm a happy amateur aquarist and will return to aquarium co-op for future needs.

Roy C. (Yulee, FL, US)
Sponge filter

Love them

Tyler S. (Philadelphia, PA, US)

Aquarium Co-Op Coarse Sponge Filter w/ Easy Flow Kit

Jane (Manti, UT, US)
No complaints

Been using these filters for about a month. I like the larger pores in the foam and that it can take an air stone. Love the weight so it doesn’t pop out of the water! Very happy with mine. I bought 4 in two sizes.