These flexible fine bubble airstones are perfect for aquariums, tanks, hydroponics and smaller koi ponds, aquariums and fish ponds.Virtually unbreakable, easy to clean and extremely bendable these airstones have a 3/16" barbed air inlet set into the body of each diffuser. Recommended airflow range is from 0.03 to 0.2 CFM (cubic feet per minute).
Avilable in 2 foot, 3 foot and 4 foot lengths.
Airflow recommended per airstone
2' diffuser = 0.1 CFM
3' diffuser = 0.2 CFM
4' diffuser = 0.3 CFM