K&H Thermo-Pond 250W Pond Heater Deicer Thermostat Floating or SubmersibleK&H Pet Products Deluxe Thermo Pond Perfect Climate Deicer 250W helps keep ponds ice free in a small area to support winter oxygen exchange for live fish. Thermostatically controlled for efficient heating. Safe for all ponds and can be used floating or quickly converted to submersible with the click of a button. Key Bullet Points: Outdoor pond heater deicer, 250 watts Supports winter oxygen exchange by keeping a hole in ice Thermostatically controlled