So i thought maybe aerator during winter killed some fish and maybe it did.I shut it off from advice i got on the forum and waiting for temps to come up to turn back on.Surface temp around 70, 18 to 20 inches down 58 and 8 ft around 52 degrees.My question is when should i turn aerator back on? Fish i found today was still alive and died a half hour or so later, attached a pic.

You gotta be down in the Southern part of the state.

I would turn it back on, but use the 15 min the first day, 30 min the 2nd day, 1 hr the 3rd day, etc schedule until it's running 24/7.

No im up by you maybe thermometer is not accurate. What kinda temps have you gotten? Did you look at fish pic?

I would guess that it's not that accurate. Water temp here is still in the 50's. Looks like bacteria infection from being stressed.

I turnef aerator back on we will see what happens and i move it closer to shore in fall