Originally Posted by turner_landscaping
That model has been known to leak in the float ring. It will fill up with water and sink. A good heater at the same price is called "perfect climate heaters" they come in different sizes. I would only every use a thermo pond 100 watt in a preform pond.
Glad to see someone jump in that can give First-Hand knowledge. Even though I may know the science behind the topic, the only actual experience that I usually have with ice is in my refrigerator's freezer compartment.