Mistletoe Product Aquarium Filter Pad, Foam White Cotton Sponge Biochemical Filter Media Roll Biological and Mechanical Filtration for Fish Tank Aquarium Filter Cartridge  (30, Pack of 1)

100% brand new premium This product is suitable for seawater, fresh water, water tank, and the size can be cut at will. Dense pore space and softness, and expert analysis is the best breeding ground for the cultivation of good nitrifying bacteria. For biochemical cotton waste and feed residue, improve the cleanliness of the water filter. The best effect is to reduce fish mortality. Clean once a month without clogging and deformation, and can be reused after cleaning.