Features: 1.High Efficiency Filtration: The aquarium sponge filter uses double ended filter cotton, which is more efficient in filtration and is suitable for both freshwater and saltwater. 2.Bio Cotton Filtration: The aquarium double bio sponge filter provides mechanical and biological filtration, providing an ideal location for microbial immobilization. 3.Safe and Reliable: The dense filter cotton of aquarium sponge filter will not suck juvenile fish and shrimp into the filter, which is safer and can be used with peace of mind. 4.Easy to Clean: The filter cotton is easy to clean, just take out the flushing water and put it back into the fish tank. Suitable for all kinds of ornamental fish breeding and fish formation. 5.Suction Cup Fixing: Fish tank filter has two powerful suction cups, you can stick the filter firmly to any tank position underwater without floating to the surface. Specification: Item Type: Aquarium Double Bio Sponge Filter Material: Bio Sponge, Plastic Application: Double Ended Bio Cotton Filter for Aquarium and Fish Tank PackageList: 2 x AquariumFilter Sponge 1 x Suction Cup Fixing Tube 1 x Connecting Tube 1 x Water Outlet