【Quietly Generates Small Dense Bubbles】This aquarium air bubble stone can quietly generate a very dense cloud of small bubbles. When the bubbles burst into the water, the sound is quieter. Create lots of thin bubbles in the aquarium, create a dazzling curtain effect. 【Double Oxygen Dissolution Rate】Great for adding oxygen, increasing oxygen levels, decreasing CO2 and raising pH in your hydroponic growing system . 【Easy to Use】2 suction cup ensures the air stone stick to the tank tightly. Durable, ideal for aquarium, aquarium and hydroponic nutrient tanks at home, office.