【Quietly Produces Small Dense Bubbles】This aquarium bubble stone can silently produce a very dense cloud of small bubbles. When bubbles burst in the water, the noise is reduced. Many small bubbles are produced in the aquarium and produce a dazzling curtain effect. 【Double Oxygen Dissolving Rate】Ideal for adding oxygen to your hydroponic system. Increase oxygen content, reduce CO2 and increase PH. 【Easy to use】2 With the suction cup, the air stone is firmly adsorbed on the tank. Durable, ideal for home, office, aquariums, aquariums and hydroponics. 【Adjustable】If you need a very dense cloud of small bubbles, please adjust the air pump by hand . The air volume of this nano aquarium can be adjusted via the control valve. 【Buy 1 and get 3 free accessories】This fantastic aquarium stone kit contains a nano disc, a disc 35 mm air tube, a control valve and 2 suction cups. Suitable for 11-58 liter aquarium and 1.5-3W air pump. Number of shipments: 1 pcs