chuck, aeration is going to mix the entire column.. and depending on where you are in our great state, it may not cool the surface. 79 is a very comfortable temp for most species in KS waters, I wouldn't be concerned with that, the temps shouldn't vary much with good aeration, properly run.
Just because it's cooler doesn't mean there is more O2 present, It's actually more important to keep the hypolimniom from forming which contains the hydrogen sulfide in that anoxic layer.
If you'll share your species and part of KS, we can tell you if there's an issue, but I wouldn't stop running at night with those temps, in fact I would be quite happy with that.
Last edited by Snipe; 08/20/23 11:54 AM.
