[Recyclable Materials] - Aquarium bubbler High temperature sintered bubbles of high temperature sintering which, differ from stone the General the features of the bladder, and the material of the durable, cleaning can Return, replacement use for a long time. [As Tool to Use] - aquarium bubbler immerse the dispersion for a short time in the water.To connect the air hose and horizontal.Needed to buy another air pump, tracheal are used together. [FEIN Compressed Material] - Aquarium air diffuser aquarium air stone bubbler replacement for aquarium This aquarium air stone made with high quality materials. These air disk used FEIN compressed material, so that the bubble small. [Recyclable Materials] - Aquarium Bubbler High temperature sintered bubbles from the high temperature sintering stone which, differ from the General the features of the bladder, and the material of the durable, cleaning can Return, use replacement for a long time.