I have three 200watt tronics, two 100watt tronics, and one 200 watt ebo-jager heater. The tronics have been used in both freshwater and saltwater applications, and the ebo-jager has only been used in freshwater applications. The oldest heater (a 200w tronic) has been running for about four years straight, the ebo-jager about three years. I've never run into problems with either heater.
-Rich
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