Pond Boss Forums AERATION Systems questions Figuring flow rate between pump & diffuser discs?

Pretty much what snrub said. It looks like it takes 1.5 cfm to get the disc to start producing bubbles. So, if the pump produces 4.0 cfm, that would barely get you enough to run two diffusers. Like all things mechanical, pumps will wear over time and be less efficient, so I would feel better starting out with a pump that produces close to the maximum cfm of air that I will need at the psi where the diffusers will be placed.