Information about AQQA Ultra-Quiet Submersible Sponge FilterEnsure a crystal-clear and healthy aquarium with the AQQA Ultra-Quiet Submersible Sponge Filter. This air-powered filter provides both mechanical and biological filtration, promoting an excellent living environment for your aquatic inhabitants.Ultra Quiet Submersible FilterThe AQQA Aquarium Sponge Filter is air-powered and ultra-quiet, providing efficient filtration without disturbing your fish. (Please note: An air pump and air hose are NOT INCLUDED in the package and are REQUIRED for operation.) Please prepare a suitable air pump for this filter according to your tank size.Mechanical and Biological FiltrationThis sponge filter offers comprehensive filtration. The sponge provides mechanical filtration, with a vertical pattern design that increases the filtering area and efficiently filters out debris. Bio ceramic media balls deliver biological filtration, helping to decompose harmful substances and cultivate beneficial nitrifying bacteria simultaneously.Easy to MaintainBoth the filter sponge and bio ceramic media balls are replaceable. You can easily remove the sponge from the filter for cleaning or replacement (two sponges are included in the package). The bio ceramic balls are also washable and reusable, or you can swap them out with other filter media as needed.Multi-functional Aquarium FilterThis fish tank sponge filter combines filtration, aeration, and water circulation in one unit. It helps keep your fish tank crystal clear and provides an excellent living environment for your aquarium inhabitants.Wide ApplicationThe AQQA sponge filter works great in breeding fry tanks, shrimp and betta fish tanks, and both freshwater and marine tanks. The small filter is suitable for 5-20 gallon tanks, while the medium filter is suitable for 20-110 gallon tanks. Please squeeze the sponge repeatedly until it is full of water so that the filter can sink to the bottom of the aquarium. Build-in Air StoneBuild-in air stone helps with aeration and circulation of nutrition to your hydroponic system. L-connector to Air PumpConnect to the air pump, suitable for 4mm/0.16in air tube Easy to Set UpPlease squeeze the sponge repeatedly until the sponge is full of water, so that the filter can sink on the bottom of the aquarium. 24 Hours Efficient FiltrationThe sponge filter provides mechanical filtration, with vertical pattern design, increasing the filtering area and helping to filter efficiently; Bio ceramic media balls provide biological filtration, it helps with decomposing harmful substances and cultivating beneficial nitrifying bacterial at the same time.The fish tank sponge filter combines filtration, aeration and water circulation in one, helping to keep your fish tank crystal clean and provide an excellent living environment for your aquarium inhabitants.