Wall-mounted air filter with inflator, for capacities up to 50L, €19.00/unit. 20mm tube diameter. An excellent solution that ensures good mechanical and biological filtration. Organic pollutants are broken down by biologically active bacteria nesting in the sponge's pores, while impurities are mechanically filtered by the structure. This also provides excellent aeration to the tank. This is important for the healthy growth of all farmed fish.