I'd shut the system down for at least 4 days, and then run the aeration from the deepest points for 4 hours from about 4am to 8 am for a week, then check temps. If you have or want to spend the $$$ on an O2 meter, knowing your dissolved oxygen at the deepest would be very useful info!
My guess is that your water quality is really good, and there is plenty of dissolved oxygen if your water temps are that high or your Rainbows wouldn't be alive. 70* is considered the deadly high temp zone, but in good conditions, they can survive in 80* temps, but not for very long.
What is the temp and flow from the feeder springs? The trout probably hang out close to those if there is significant flow and lower temps....
Last edited by Rainman; 06/28/16 06:53 PM.
