I have a 5 gallon bucket with poultry nipples on the bottom for my chickens. I wanted to do an elaborate system of pvc pipes and nipples but resisted due to the thought of them freezing up during winter. I now only have to worry about keeping the bucket from freezing. I have looked into de-icers and have decided on this one from amazon.... http://www.amazon.com/Farm-Innovato...03E8/ref=sr_1_6?ie=UTF8&qid=1317658671&sr=8-6 Does anyone have this particular model? If so, can you tell me how you like it?