Hello everyone! In April, I set up a sugar kettle pond and I put in 12 inexpensive feeder goldfish. Here we are 8 months later and they are all alive and thriving! But, the weather is turning colder. (I live in SE Louisiana.) My son also put in some of his fish from his tank, and they died recently during a cold snap. There were four tiny catfish and a pleco. He is very upset with me for not putting a heater in the pond. I have asked the "fish guy" at our local pet store, and he seemed "on the fence" as to whether or not I even need a heater. My SIL has a similar set up, and she said her goldfish do fine during the winter months. I'm pretty attached to my little fish and certainly don't want them to freeze their tails off. But, I'm sure it's not easy to heat a 450 gallon pond, either. I would love input from this group! Thanks in advance!