High Dissolved Oxygen---Aquarium Nano Air Stone releases smaller, denser and more uniform bubbles, increasing the flow and circulation of air, doubling the dissolved oxygen rate in the water and providing good health benefits to aquatic organisms Quiet Make Fine Bubbles---The air stone bubbler creates more small and dense micro bubbles without much noise. It provides a quiet enough day and night for you and your aquarium fish tank Excellent materials---The air diffuser is corrosion resistant, translucent through and through, ad can be integrated with aquatic plants. Non-toxic and stable, fish tank bubbler decorations can be used in freshwater saltwater Applicable Air Pump Wattage---Airstones should be used with air pump, recommended Air Pump Wattage:>1.5W. Air stone is compatible with air tube with inner diameter of 4mm Package Information---1 nano air bubble stone; 2 suction cups to hold the air bubble stone firmly at the bottom of the tank; 1 adjustment valve to adjust the air volume as needed (Note: air stone and air tube are not included)