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 2657 reviews
93%
(2477)
4%
(99)
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(35)
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(15)
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(31)
D
Dane (Stockton, CA, US)
Sponge filter

Enjoying the added extension tube. Provides visible flow and surface agitation with less bubbling noise.

S
Susan M. (Stowe, VT, US)
So easy! 100% Happy!

Wish I knew about sponge filters earlier! I would have set up a quarantine tank years ago for new fish. Easy to set up and easy on the wallet. I’m super happy with the results in maintaining quality water. Aquarium Co-op ships quick and has well designed products! And also like the fish sticker gift they sent with my order. 100% Happy!!!

D
Darren L. (Arcadia, CA, US)
3 in 1 upgrade

I bought an upgrade kit for the existing small sponge filter, and a mini easy flow kit, both working great. They generate small bubbles, creating some flow on the water surface. They don’t make bubbles bursting on the water surface and thus have no water spilling over the outside of the tanks.

S
Steven L. (Tampa, FL, US)
Sponge filter

I was amazed by how strong the flow is. Very good filtration, the coarse sponge is good at capturing fish wastes but also provides a big enough space for small snails to get in and eat the waste, which reduce the maintenance overall. Recommended for tanks that are smaller or equal 10 gallons.

m
michael m. (Langhorne, PA, US)
easy to set up

they seem to be keeping my water clear, although I have them in a 50 gallon, 2-10 gallon tanks along with a filter. using them for a filter along with extra air flow for the water and water movement.