XINYOU XY-1831 Filter Sponge Aquarium Filter Cartridge | Pack of 4 (12 pcs)

The biochemical cotton has the best effect on decomposing the excrement and the forage leftovers and improving the filtering and cleaning of water, it can reduce the death rate of fish Being cleaned with water once per month, without blocking and deforming, it can be used again after cleaning can be repeated for use up to 16 times. Material: biochemical cotton