Welcome to ShenMo shop! Quietly Produces Small Dense BubblesThis 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 RateIdeal for adding oxygen to your hydroponic system. Increase oxygen content, reduce CO2 and increase PH. Easy to use2 With the suction cup, the air stone is firmly adsorbed on the tank. Durable, ideal for home, office, aquariums, aquariums and hydroponics. AdjustableIf 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 through the control valve. Buy 1 and get 3 free accessoriesThis fantastic aquarium stone kit contains nano disc, aquarium disc 35 mm air valve, a control valve and 2 suction cups. Suitable for 11-58 liter aquarium and 1.5-3W air pump. Due to manual measurement, the products you receive may have some dimensional errors Due to different monitors, the products you receive may be slightly different from the pictures Actual delivery quantity: 1 piece 100% satisfaction - Our customers are our priority. If you find any problems with the products after receiving the goods, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service.