Tagged for answers.

My $ says water temp is just high enough so dissolved o2 is low...but, if aeration is in use at night, seems like the cooler, deeper water would have available o2.
How deep is the pond?


Half acre 30 year old farm pond, Mebane NC. Aeration & feeder.
LMB, CC, SC, BG, HBC, two no account welfare carp and nine seasonal Tilapia that all the other fish are terrified of.