Creates silently small dense bubbles. This aquarium bubble stone can silently produce a dense cloud of fine bubbles. As bubbles rise and burst, noise is minimized. The abundant bubbles create a visually appealing curtain effect in the aquarium. Doubles oxygen dissolution rate, making it excellent for increasing oxygen levels in hydroponic systems. Helps increase oxygen content, reduce CO2 levels, and raise pH value. Easy to use with a suction cup that securely attaches the nano air stone to the tank. Durable design, ideal for home, office aquariums, and hydroponic nutrient tanks. Adjustable bubble output. For a denser cloud of bubbles, manually adjust the air pump. The air flow of this nano aquarium bubbler can be controlled using the included valve. Note: Hose and air pump are not included.