New to the forum. I just set up a Brewtech in line oxygen stone. I am moving roughly 2gpm from the brew pot to the fermenter. I installed a liter per minute gauge. So now how do I calculate the liter per minute at 2gpm for the correct oxygen level for something like a 1.052 gravity beer? I have been told turn it on till you barely see the bubbles but is there a more exact method? Is there a formula?