Product description:

rattan cotton 50x50x4 200X100x4 (you can choose the required size)

used for large and medium filtering basin. Good durability, good filtering effect, and use environmental protection materials suitable for the growth of digestive bacteria as filter material, which is suitable for cultivating a hotbed of excellent nitrifying bacteria. Biochemical felt can decompose excrement and feed residue, improve water quality and improve fish life rate