White aquarium filter cotton AKA: aquarium filter cotton, aquarium biochemical cotton, aquarium biochemical cotton, is a professional aquarium or fish tank filter material for aquaculture, it can effectively adsorbed fish excrement and food residues generated in favor of the tank The environmental cycle, the aquarium industry is currently the most widely used of a filter material, the general color is white, conventional thickness 10mm, 20mm, 30mm, small fish tank can be larger with a thin, large fish tank, water pressure, we recommend using thick The filter material, so use a longer time, not so easy to be easily replaced. It is worth noting that the market is now in many shops selling a hard filter cotton, it's relatively hard surface layer of particulate matter, the kind of materials are widely used in industrial production, it is a gelatinous product of aquatic environment and fish are affected, it is recommended that you do not want freeloaders and washed several times, or buy better products with no additives, so that the fish health is also guaranteed. Aquarium filter cotton white regular size: 1mX20m, 2mX20m. Other sizes or sheet can also be customized.