I read on some of these pond aeration type websites where they are talking around 2000 gallons per minute of lift for a 9 inch diffuser. Is this right or am I reading it wrong?

I have a 9 inch disc EDI membrane diffuser and I will be pumping .5 cfm's of air. It will be in about 12 feet of water. What kind of lift or gallons per minute should I expect? I am trying to calculate correctly how many diffusers I will need.


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