Everyone, thanks for all of the discussion input!
The air temps I noted, are during one of our typical 3-5 day heatwaves. Our "normal" temps are significantly lower. However, they show how much weather stress can be rapidly forced upon the fish. For a thriving SMB/YP pond, I am definitely going to have to get my aeration correct.
I think Augie's method of midnight to 7:00AM with the diffuser a few feet off the bottom is what most of the people in the hotter regions use to keep the waters as cool as possible, yet still oxygenated.
I think my best plan will be to build the pond and then muck around with the aerators, a thermometer, and a DO meter for a year while the pond just has FHMs. I can report my data to the Pond Boss forum and receive copious amounts of excellent advice!
