A good and timely question from Esther who asked, “I have a small pond in my front yard I have 2 koi and 3 goldfish, I live in South Carolina and in the winter the temperatures can drop down to freezing but they recovered with the sun. I don’t think the pond will freeze solid but I’m wondering about my fish. Should I put a heater in the pond? What temperature should I try to maintain the water? “
Thanks for the question Esther!