Thanks for your thoughts!!!
I assume getting some aeration would help a lot, as would pulling some fish out.
Getting out of the high 90s wouldn't hurt either.
I have quite a few turtles - some small to medium sized turtles swim over and compete for fish pellets, but I've never seen them bite, mainly they get shoved under by a ton of catfish converging on them.
Anything else, especially that can be done quickly/cheaply?
Salt?