The patented Cast Aluminum design offers -
Safety: Safe in all tanks including plastic tanks without the use of a guard.
Durability: Only floating de-icer on the market with a 3-year warranty.
Efficiency: At 1250-Watts, outperforms standard 1500-Watt floating de-icers.
Anti-Chew cord protector for safety around animals. Thermostatically controlled to operate only when necessary. Guaranteed for 3 years. UL listing denotes proven safety.
I have a 150 Gallon stock tank. I thought I would try this design. Barely got below freezing and the water had slush in it. Our winter temps get down to around -10 come January. I will NOT be buying this style deicer again.