I did a test on a customers property. 4 ponds, all built within 3 years of each other, all about the same size and depth. It was a 2 year test.
#1 Was the control - no aeration #2 Had bacteria added per mfg recommendations no aeration #3 Had bacteria per mfg recommendations w/aeration #4 Was another control - aeration but no bacteria added
The thickness of muck was measured 2x year.
#3 had approximately the same amount of muck reduction as pond #4. Pond #2 had slightly less muck than pond #1, (approx 1" per year) but the juice wasn't worth the squeeze..... Ponds were all 10'-12' max depth.