The microporous structure is easy to pass water, the internal pipes of the filter material communicate with each other to prolong the service life, and the honeycomb micropores are not easy to be blocked. It is easy to form an oxygen-rich environment to improve the efficiency of the digestive system, which brings a larger cultivation area and is more conducive to the reproduction of nitrifying bacteria. It has fast adsorption Fish excrement, residues, etc. will be decomposed and purified to purify the water, thereby enhancing the immunity of the fish