I have been reading all the questions about store bought water heaters for winter. Most are $35 and up. I replied to a post on how I built a heater. Mine was a 15 watt light bulb in a 4" concrete block mounted on bricks that keeps my water from freezing. Not the safest way of doing it with wood chips- straw for bedding. You all know how chickens can send all the bedding flying. There must be a lot of folks here who have come up with there own way of heating water safely. Lets come up with some of the best ideas that can be put in the Learning Center for the future builders. What do you all think? John