Features Our Upettools Nano disc air stone is smooth and exquisite, unlike other poor-quality air stones that touch rough. The air diffuser area quietly produces small & dense bubbles, super sturdy and durable. Package Includes: 100mm Nano air disc stone,1 control valve,2 suction cups (Please note: the deeper the nano-disk is placed in the fish tank, the gas pump watts may need to be increased to drive) Easy to Clean: Please soak me in the water, gently brush the dirt on the surface with a brush, dry in the sun for half a day, and you will get a new perfect mano bubble stone. Range of Use: Office, fish tank, decoration, hydroponic environment. Freshwater and saltwater can do. Healthy and beautiful environment: The air volume of this nano aquarium bubbler can be adjusted by the control valve. High Dissolved Oxygen Rate: Compared with ordinary bubble stone, the nanobubble stone emits more bubbles, and the gas and the water surface are more widely contacted, which makes the dissolved oxygen amount larger.