The larger the surface area, the better the bio filtration effect. Thanks to 1100m2/L high surface area create an excellent medium for the nitrification bacteria to grow to keep the water healthy finally. It is light and thin, plus internal and external abundant pores, so it can absorb the water quickly. In junction with the excellent porous structure, it will cultivates more bacteria easily to quickly decompose the nitrate and ammonia, to keep the water healthy. This neutral filter media not only will not influence the hardness and pH of the water, but it will release mineral elements that is beneficial for the fish health.