Powkoo Sponge Filter Aquarium Air Filter Bio Filter Sponge Betta Shrimp Fry Fish Tank Sponge Filter

6-layer corner sponge filter -- provide excellent both mechanical and biological filtration, air powered, works great without noise, keeps water cycled and clear?Fits fish tank size: 10 to 35 litre? The sponge rib shape design, increase oxygen, provides ideal location for beneficial nitrifying bacteria to colonize, the sponge is high density porous 60ppi fine sponge Easy to use. connect the tube to the air pump and connect it to the filter. plug it in. It works. provide both aeration and filtration for your fish Easy to clean and assemble, simply rinse and squeeze sponge in tank water. Recommendation: replace bio sponge every 6 months to ensure filtration effect and growth of nitrifying bacteria Corner shape fits well in any corner, little sponge filter doesn't take up too much room, great bio sponge filter for shrimp tank, betta tank, goldfish, fry, baby fish or breeder tank. can be used as pre-filtration unit by fitting to an external or a top filter