Not trying to confuse anyone but I have used that test data for years and you have different figures from the same test.The figures I have are using 1 CFM on 1 Coactive airstation at various depths.AES and Ottorbine systems were also tested and came up short. Just trying to keep all of the information by us Vertex Dealers on the same page. I have a link to the test data in my diffuser section at www.aquaticaeration.com Ted