DescriptionThe Fish Tank Sponge Filter featuring a weighted plastic base that keeps the unit from floating during use and cylinder design to eliminate dead space between the filter. In addition, the sponge filter traps waste particles mechanical. As the water passes through the pores, the sponge will trap debris from your tank, leaving the water crystal clear. It is very efficient and will break down toxic waste from the tank.Feature- Color: Black._x000D_- Material: Plastic and sponge._x000D_- Size: Approx. 11.5 x 5.6 x 5.6 cm._x000D_- Biochemical sponge filter provides both mechanical and biological filtration._x000D_- Simply install an airline into the unit and provide both aeration and filtration for your fish._x000D_- Easy to clean, simply rinse and squeeze sponge under cool running water._x000D_- The sponge filters pores have a large surface area where aerobic bacteria can propagate._x000D_- Perfect for fish tank use.Packing List:2 x Fish Tank Betta Filter