Keep in mind that Vertex diffusers have special built-in valves for balancing air flow among multiple diffusers, thus they require slightly more psi to make the diffusers work properly compared to most all the standard or commonly available membrane diffusers. Optimum air flow to most single diffusers is 0.5 to 1 cfm, although membrane diffusers are designed to operate at higher air flows of 1 to 4 or even 6 cfm. As the airflow exceeds the optimum cfm the membrane slits open wider and bubbles are bigger then reducing the efficiency of the air flow to the diffuser. Remember - smaller bubbles mover more water compared to the same air flow using larger bubbles. When in doubt check with each manufacturer for specific flow ratings.
Last edited by Bill Cody; 09/01/15 09:01 AM.
