The Cobalt Anti-Ice Pond Heater combines reliable thermoplastic heating with convection technology to make the most energy efficient and effect pond de-icer. As the water heats around the core of the Cobalt Anti-Ice Pond Heater, an upward current of warm water is created and is directed outward ensuring an ice free area of the pond surface around the heater. This ice free zone allows potentially lethal toxic gases to escape the pond into the air, and the exchange of oxygen into back into the pond water. Convection effect can be enhanced by adding an air stone at bottom of tube.