Tetra cartridge BF BioFoam S (set: 2 pcs.) black Review

The biological filter sponge is designed for use with external filters of the EX 400/600/700/800 series. Cultures of biologically active bacteria settle in the sponge, which convert the poisonous nitrite into nitrate, which is a fertilizer for plants. In addition, the structure of the sponge itself is involved in the cleaning process, carrying out mechanical filtration. Suitable for use in both freshwater and marine aquariums. Biologically active bacteria settle in the sponge: dangerous nitrites are converted into nitrates. The structure of the sponge ensures good mechanical filtration: small, visible dirt particles are removed. For all freshwater and marine aquariums.