Hey Tom,
I just read thru the post you attached earlier. What I take from that discussion is, if you don't have a DO meter, then temps ranging less than 5 degrees from top to bottom is a relatively good method of determining O2 saturation throughout the area of the diffuser.

That being said, with a variance of only 3 degrees from 20" to 10.5' and a visibility of approx 24", I think my assumption of having a full turnover are validated.

This raises other questions for those of us with deep South ponds....

1) How warm is too warm?

I've found some postings elsewhere that say that 88-90 water is very tolerable by BG,LMB and RES, and I know GSF seem to like it hot as they are always right against the banks. I'm figuring most other species of panfish are just as tolerant to these temps as well. But when does it become unhealthy for all of our finned residents?

2) From a pond health standpoint, knowing warmer water holds less oxygen, how does warmer water affect the anaerobic digestion of detritus and accumulated muck?

.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!