AP, I don't heat mine when I leave. Once it got so cold in it that beer cans froze and busted n the refrigerator. I figured an insulated fridge would be pretty well bullet proof.

I actually blow out my water lines when I leave. I attach a fitting to the kitchen faucet, add a tire valve from the motor home place and push the water out into the sink of the bathroom with a compressor.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa