The temperatures dipped quite low again, and the stock tank heater in our pond is the only thing keeping a hole open.
It’s important the pond not freeze over since that traps gasses in the water and kills the fish and frogs. We learned this the hard way a few years ago. If an electric heater isn’t practical, you can put a big chunk of styrofoam in the water, weighted in place like a buoy so it won’t blow away.
It’s strange to see goldfish swimming around when it’s below zero outside. They’re happy, though, because this time last year we saw several tiny baby fish in the pond. The birds, stray cats and raccoons appreciate this small oasis, too.