sniff sniff Poor cow.
I live in a pretty cold area and my pond is only 4' at the very deepest. I have one koi and lots of goldfish in 2800 gallons. The worst it got was down about 2' of ice. The fish have a cave beneath the rock that lines the deep end and they go there to sleep all winter, around six months from beginning to end. Not really winter but they don't come out immediately in the spring. Guess it takes them a while to wake up. I pump water from the deeper end to the shallow end to keep the water circulating and oxygen levels up in the caves. Also use deicers to assure a couple of holes in the ice of the water being lofted about 2' from the surface isn't enough.
