Xinyou Big Sponge Filter XY-2837

chemical sponge filter is a filter that keeps your aquarium clean .The filter provides mechanical and biological filtration for easy aquarium maintenance.As a mechanical filtration use the air-driven system to create suction.that allows the sponge to capture floating particles in the water and return filtered water to the tank.As a biological filtration, harmful wastes are biologically transformed into a relatively harmless substance by aerobic bacteria that accumulates in the sponge.