It sounds to me like the prop wash of the pontoon boat does more to remove muck, lift it up, stir it, get oxygen under it than any enzyme tablet on the top of the muck.

Is there study of mechanical agitators combined with aeration?

My brother in law was amazed at how a couple years of fountain induced surface agitation could not do much for the bottom of the pond even in the shallows, but one summer of bottom aeration and he has nice sandy bottoms in the shallows.

But someone out there surely must have a way to get the right enzymes, bacteria and superfuel their growth and have them help with the process of breaking down or consuming the organics at the bottom?