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I DID figure out how to get trout to live all summer long in a deep pond, it required surface agitation and specific placements of the subsurface air stations. (it took 3 years of trial and error) and THAT pond has the aeration systems running 24/7...........

That's a notable achievement. Most of the oxygen came from surface agitation, so what are your thoughts on role of aeration? The pond was deep enough that there was cool water mixing effect and then the surface agitation oxygenated it?