[Recyclable Material] - Aquarium Bubbler High temperature sintered bubbles, different from the characteristics of stone bladder, and the material is durable, clean and can be used for a long time. [Use as a tool] - The aquarium bubbler immerses the scatter in water for a short time. Connect air hose and level. Need to buy another air pump to use with the air tube. [FEIN Compressed Material] - Air Stone Aquarium Air Diffuser Replacement Aquarium Aerator for Aquarium This Air Stone for aquarium is made of high quality material. These air discs use FEIN compression material to reduce air bubbles.