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.

Height of Sponge Filters

Item	Height with Easy Flow
Nano sponge filter	11–21 inches
Small sponge filter	10–20 inches
Medium sponge filter	12–22 inches
Large sponge filter	12–22 inches

Recommended Sizing Chart

Aquarium Size	Sponge Filter Size	Fitment
Small column (or narrow) tanks	Nano	Trim the tube heights to shorten if needed
5.5-gallon tank (and other tanks shorter than 10")	Small	Trim the tube heights to shorten if needed
10-gallon tank	Small
20-gallon high tank	Medium
20-gallon long tank	Small
29-gallon tank	Medium
30-gallon tank	Medium
40-gallon tank	Large
55-gallon tank	2 Medium
125-gallon tank	2 Large
Tanks deeper than 22"	Medium or Large (2 or more)	Stack the sponge filters to increase height

Additional Supplies Needed

The sponge filter cannot produce air on its own, so you also need to buy the following components to run the sponge filter:
— Air pump
— Airline tubing
— Check valve (to prevent water from pouring out of the tank when the power is off

Pore Size: 25ppi (different manufacturers rate porosity slightly different as it's an approximation)

Installation Instructions:

Read this article with step-by-step instructions

Cleaning Instructions:

1. Use a fish bag, ziplock bag, or pitcher to put around the sponge while inside of the aquarium.
2. Lift the water and sponge out to catch the majority of debris that will come off while removing.
3. Use the aquarium water and squeeze out the debris from the sponge.
4. Discard the water and get more water from the aquarium.
5. Repeat Steps 3 and 4 until sponge filter is mostly free of debris.

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