6-Pack Large Air Stones, Humongous 4 x 2 Inch Round Air for Aquarium, Hydroponics, Fish Tank, Koi Pond, Cylinder Bubble Diffuser for Pump, Growing System
Each cylinder measures 2" D x 4" H and weighs 0.66 lbs. Fits 3/16 inch standard airline tubing. Recommended a high-output air pump at least 10W. Made from washable silicon carbide. Fit for hydroponic systems, koi ponds, aquariums or fish tanks, and other systems.
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