孔穴设计形成表面积，孔穴与孔壁畅通互联，

有利于硝化细菌附着繁殖。

中性滤材，无碱性物质析出，淡海水通用，可长久使用。

耐搓耐洗，耐化学侵蚀。

Holes are designed to form surface area, and holes and hole wall are connected smoothly, which is conducive to 

the adhesion and propagation of nitrifying bacteria.Neutral filter material, no alkali material precipitation, can be 

used for fresh water and sea water with a long life time.Resist rubbing and washing, resist chemical erosion.