Pond Boss Forums AERATION Systems questions Need small pond advice

I have thought that the O2 added from air contact at the surface and then distributed throughout the pond by circulation constitutes more O2 input than what is directly added (by the bubbles) in an aerated pond. Am I right or wrong?

Or are you saying that total O2 addition from the Kasco, direct addition AND surface methods, is 2.2 lbs/hr?