Thanks, I learned that the hard way this summer, that's the reason i waited to restock until late september when bottom temps dropped to 58. Moving fwd I will be stocking in spring and fall, expecting to harvest or lose the fish by July.

Bottom temp today was up 2 degrees to 60, a few hot days ahead (75/55) but hopefully temps stay down with the colder nights.

I think I will gradually increase the aerator running time to 24hrs and monitor temps