This low watt, energy efficient pond de-icer is perfect for all types of backyard ponds Thermostatically controlled heater works automatically during freezing temperatures to keep a vent hole open in the ice This allows the harmful gasses caused by plant decay and fish waste to escape Its low profile design is ideally suited to minimize wind resistance and goes virtually unnoticed in the pond The heated pond saucer has a 10 power cord and comes with a one year warranty 200 watt