Orlushy Aquarium Nano Bubble Air Stone Disk, Ultra-Silent Fish Tank Bubbler With 2 Inch Detachable Backup Nano Disk, 1 Control Valve, 2 Suction Cups For Aquarium Fish Tank And Hydroponics (2 Inch)

FeatureSize: 2/4 inchColor: greenSteps of installation: Immerse the air stone in water for 2 hours before using. Connect the air stone to the tubing and the tubing to the air pump next. Turn on the air pump and regulate the volume of air properly. If the depth of the water exceed 15inch(40cm) please properly increase the wattage of pump.Tips:Immerse the air stone in water for about two hours before first time using.Please properly increase the wattage of pump if the depth of the water exceed 15inch(40cm).Package:1 nano air stone1 backup nano disk2 suction cups1 control valve