Jerry wrote
Has anyone lost fish after just a day or two?

I did.
Out of the blue our temperature dropped from the middling 30s
and no ice on the pond to 19 below over night. Our power went
off for much of the day, then it snowed, and snowed and snowed
and hordes of teenagers got stuck at our house and needed feeding
and shelter and we had wall to wall to wall band practice...
I think I got out to the pond by the end of the second day to melt
a hole in the ice and then put in a heater and a bubbler. Lost a lot
of fish.

kathy