The sinking de-icer operates at the bottom of the tank where it is less likely to be disturbed by livestock, protecting both the equipment and animals. The strong, durable, stainless steel heating element is thermostatically controlled for efficient operation. Rugged and weather-resistant construction handles the elements. That thermostatic control coupled with thermal feedback protects the unit from overheating. The thermostat is positioned above the heating element to ensure safety in low-water conditions. Each de-icer comes complete with a galvanized wire guard for use in plastic tanks. Recommended for use in 100-300 gallons of water. 6-foot cord with durable anti-rub protector