Mine is simular to Randy's. When I first turn it on, I let it run long enough on manual to fill the well. Then I switch it to the timer and forget about it. I don't have a problem with fish or minnows dying any time of the year unless I have 50 or 60 bream in it.
DP
I am a heterosexual male. 2 Chronicles 7:14
"If my people who are called by My name will humble themselves and pray and seek My face and turn from their wicked ways, then I will hear from Heaven and will forgive their sin and heal their land."