Can easily drive even Nano air pumps, suitable for aquariums, fish tanks. MODEL: ASR-020. Nozzle volume: 1L/min, recommended air pump power: 2W-4W. Made of high quality non-toxic mineral material. Suitable for pipes with an internal diameter of 4 mm. Compact diameter: 20 mm. Net weight: 120g. Soak the stone completely in water for about 1 hour before use. Comes with 10 Airball Stones. Spherical Air Stone An Airstone whose purpose is to gradually disperse the air in the tank and provide oxygen to the breathing fish, a necessity if you are an aquatic animal lover. #39;air UnicLife are made from high quality non-toxic minerals. With high temperature sintering, the stones are strong and durable, have high levels of dissolved oxygen, and produce uniform tiny bubbles instead of a limited number of large bubbles. Made of mineral material high quality and harmless Create small bubbles instead of bigger ones Allow your fish to breathe oxygen What kind of stone to air stone should I use Let’s