Pond heater and ice guard. Energy efficient only 150 watts. The super fish pond heater protects your fish. When the pond frezes over with ice the pond heater guarantees to keep a hole in the ice, this is necessary for the exchange of oxygen and gasses. Also the heater keeps the pond water marginally warmer. Includes Styrofoam and 5m cable. Stainless steel heater 150 watts. Tested at -20 C.