boyu Sponge Aquarium Filter(Biological Filtration for Fresh Water)

Description

precise bio-sponge with an enormous surface area. It can absorb all dirty substance while cultivate nitro bacteria Ideal for breed of discus, dwarf cichlid, guppy and killifish It can help in filtering any tank without sand (in the tank) Working theory Use air pump or submersible pump to create an water current, in order to get the effect of filtering