1500W, Submergible De-Icer With Guard, Made For Plastic Tanks & Maybe Used In All Tanks, Thermostatically Controlled To Operate Only When Necessary, Designed To Sit On The Bottom Of Tank, Protective Sturdy Guard, Designed To De-Ice Tanks Up To 300 Gallons, Will Keep Water Between 35-55 Degrees, Guaranteed For 1 Year.