A update guys.... Bad news for me,,, bill you were right and Iam bummed out.. Last week i went away for 6 days and came back to see most of the trout floating! Sad... I was told by a friend over this way that i stood a better Chance of not aerating pond due to bring up bottom temps... Should have listened to guy i got the trout from and you guys,,, he told me to turn on aerator and leave it on all summer.. Surface temp now is 79.. Temps I'n deep holes still at 50 to 56... Last week we had blazing temps no wind and muggy. Guess i try again this fall and run air. Man I am bummed.