Silently 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 dissolution rate Ideal for adding oxygen to your hydroponic system. Increase oxygen content, reduce CO2 and increase PH. Easy to use 2 Through 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 60 mm air filter, a control valve and 2 suction cups. Suitable for 11-58 liter aquarium and 1.5-3W air pump. Aquarium Nano Bubble Stone Instruction Manual: The product is used in aquariums to increase oxygen levels. Before using the air stone, please put it in the aquarium water for 15 minutes to 2 hours before using it. In this condition, the effect is better. This air plate is used in conjunction with an air pump with appropriate capacity: if the capacity of the air pump is sufficient, the air plate can achieve better atomization effect by adjusting the air outlet of the air pump. Make sure all parts of the air pump and air stone are well connected. We recommend cleaning the disc once a month. Package includes: Nano air disc stone 60mm, 1 control valve, 2 suction cups The air volume of this nano aquarium bubbler can be adjusted via the control valve. Scope of application: office, aquarium, decoration, hydroponic environment. First situation: no oxygen escapes from the nano-bubbles Before using nano-bubbles, soak them in aquarium water for 15 minutes so that the water fills the entire plate air pump Check if the control valve has been opened Second situation: generates noise: Check the pressure of the air pump. p> If the air volume in the air pump is too large, the bubbles will be too big and too dense and the cracked water will make noise. The volume control valve of air is necessary to regulate the air volume of the air pump and to eliminate noise Third situation: it is not bubbling properly It is necessary to check that the pump air pump has enough power to drive the nano-bubble stone, because the air outlet of the nano-air pump is relatively small and the required air pump pressure should be sufficient Check if the control valve has been opened