Product Details Built-in thermostatic control automatically turns on when needed and switches off when temperatures rise above freezing. The heater is safe for use in plastic containers as well as metal. 250- watt heater is crafted from rugged cast aluminum with a waterproof cord, designed to last season after season and not just a single winter Despite its small size, the deicer easily thaws containers up to 25 gallon (250 watt). Cattle stock tanks, horse water troughs, and rain barrels are all kept unfrozen and flowing no matter how chilly the ambient temperature .
