Air collar makes smaller bubbles for improved performance Easy Flow accessory increases water circulation Coarse, anti-clogging sponge 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. Read this article with step-by-step instructions or watch our detailed setup video.Adjust the height of the Easy Flow curved tube so that the opening is 1/3 out of the water and 2/3 in the water. Additional Supplies Needed The sponge filter does not 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) 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. Remove the foam from the plastic basket. 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.6. Scrub the air collar as well to clear out any debris or algae that has covered the holes.7. Reassemble the sponge filter, and install it back in the aquarium