So I built a 5 gallon bucket waterer with horizontal nipples and I really like it. However now it's moving into winter and I have to keep it from freezing up, I've seen folks on here talking about using an aquarium heater to do that. Anyone out there who has found one that does a great job of keeping it liquid in freezing conditions(I live in Middle Tennessee so it's not like we have the worst of winters but at their very worst it does get down into single digits several times a year). TIA
Tom
Tom