Fish Tank Water Purified Filter Black Biochemical Foam Aquarium Pond Sponge Filtration Pad Material 50 * 50 * 2cm

This thickened Biochemical Filter Sponge is tough and durable, suitable to be used in sea water tank, fresh water tank and aqua-plant tank.

This filter sponge provides strong purification for the water, stables the water quality and reduces fish death. Good shading to reduce the algae breeding.

Moderately holes can cultivate high density nitrifying bacteria, which can decompose fish excreta and feed residues, improving water quality.

There is many size for your choice, and if none of these sizes suit your tank, you could just cut the sponge freely according to your tank as you need.

It is suggested to clean it once a month, so there will be no obstruction or deformation, and this sponge can be reused continually after cleaning.