The Farm Innovators Cast Aluminum Submergible Deicer makes sure your water never freezes over so that your chickens, dogs, cats, sheep, and other farm animals always have a safe place to hydrate. H-409 will keep water from freezing up to -10 F. The water trough deicer has a 1,000-watt design with a built-in thermostat that automatically engages when the water temperature nears freezing to converse energy draw and require no outside attention from you to keep operating. Designed to be submerged beneath the water in your tank and prevent surface ice before it starts.