Poolking's Bead Filters are excellent for particle separation, beneficial biological activity which has been successfully used in many large public aquarium applications around the world. The design highlights of the bead filter not only ensure uniform drainage and the movement of nutrients and oxygen in the filter bed, but also avoid the local disturbance of water flow and the problem of hydraulic imbalance, and improve the filtration effect. It can also avoid the generation and accumulation of harmful substances, and improve the purification capacity and reliability of the filter.