Hi. I have a 1/2 HP Kasco 2400A surface aerator centered in my half-acre triangular pond. Where it is centered, depth is about 15 ft. Deepest part of the pond is 18 ft. My question: Can anyone give me the circulation "plume" diameter and depth expected for underneath my aerator? I am hoping that someone in the aerator industry has an answer that is demonstrated by actual product testing rather than a guesstimate. The answer may shape my decision on investing in a bottom aerator instead of continuing to use my already-purchased $900 surface aerator.