Produce Bubbles: A large number of thin bubbles are produced in the aquarium to dazzle the effect. The double sealing ring improves CO2 dissolution efficiency. Adding Oxygen: Add oxygen to your hydroponic grow system, increase oxygen levels and reduce carbon dioxide emissions. No Slip: Aquarium Air Stone, the suction cup ensures the bubble stone stick to the water tank firmly and not easy to slip. Suitable for family, office aquarium, pond, aquarium.