Sinking Tank De-Icer, 1500 WattsSinking Tank De Icer, 1500 Watts The Sinking Tank 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. The thermostatic control, coupled with thermal feedback, protects the unit from overheating.