The 64 thousand dollar question.

Had a partial fish kill last year (only the biggest fish) when I was trying to aerate mostly in the day time with the incorrect theory of turning the water over when it was super saturated with oxygen during the daylight hours. I was on vacation at the time with only an email of what was going on. Had grandson pick up the dead fish and turn on the aeration 24/7 with no further problems.

I have the timer set to shut down air during the hottest mid day time period but have no idea if it helps or not with the water temps. Had the scuba gear on to clean the diffusers a few weeks back and the temperature to feel was not much different from top to bottom. That said, when on the surface swimming and you approach the diffusers, the water will feel noticeably cooler as you get near the diffuser plume. So I know there is at least a slight difference in temp top to bottom.

No help here esshup. Just a few of my observations.

John

I subscribe to Pond Boss Magazine