The fine air cell plate generates fine air bubbles. Nice bubbles will also make the oxygen replenishment vigorous. It helps increase oxygen, maintains fresh air and creates a healthy environment for fish. Silent Design Aerobic Bubble Oxygen Stone is a silent design. It is powered by a pump and makes full use of the power of gas lift. It has no power device and no noise when working. Even if you sleep, it will not affect. Adjustable Bubble Stone has a swivel design. The size and density of the bubbles can be adjusted arbitrarily. Add different effects to your fish tank. Superior suction cup design The suction cup is designed to hold the air stone, prevent friction and wear, and prolong the service life. SUITABLE FOR DIFFERENT OCCASIONS - Aquarium Oxygenation Bubble Stones can add air flow, circulation to your aquarium, pond, hydroponics and aquaculture to oxygenate the water body for the benefit of aquatic life.