Water temp in the trout pond was 49 F. this morning with night time air temp lows dropping into the 40's. Have decided to seine and move all the trout to the big pond that does not get well water once that pond stays in the 50's consistently. It's at about 60 F. now. This vs. the stress of holding and sorting to get 50 of each species left in the trout pond. I can do that in the spring. It also means I can drain and clean up the trout pond before refilling. Also only run one diffuser in the big pond and shut off the well pump until next May.
The big pond has 10 X the volume of the trout pond.