Intense Precision Atomic+ CO2 Diffuser (With Built-in Check Valve)

Precision Atomic+ CO2 Diffuser - (With Built-in Check Valve) Key Features: Super fine CO2 bubbles less than 0.1mm diameter and highest diffusion rate. CO2 is capable of 100% dissolution in the aquarium water. Atomic+ series features high quality fixed suction cups and a built-in check valve, to permit flow in one direction only. Standard 6mm CO2 tubing. Made by Intense, a well known brand for reliable, most efficient and built to last CO2 products. Sizes: Please note that all sizes are measured from end to end of the diffuser. The actual diffuser part is smaller than the overall size but is rated for tank sizes as listed below. 50mm (recommended for 5-15 gallon aquariums) 55mm (recommended for 5-20 gallon aquariums) 60mm (recommended for 20-40 gallon aquariums) 70mm (recommended for 50-80 gallon aquariums) 80mm (recommended for 80-100 gallon aquariums) 90mm (recommended for 100+ gallon aquariums) Instructions:  It requires a minimum of 30 psi working pressure. Must use CO2 pres