I was wondering if anyone here had tried using an aeration system with their stock tanks to prevent the water from freezing. We run several stock tank heaters and they really hammer the power bill. I've been playing with the idea of using aeration stones and aquarium type air pumps instead. Being winter we have down sized our tanks as they are easier to keep heated, so we are talking 8 gallons at the most. Any thoughts would be greatly appreciated, Paul.