So, I've read enough horror stories in the past few days about heaters cooking tanks when the thermostat gets stuck in the on position. I've decided that I'm going to run a temperature controller as a fail safe device to help prevent this from happening in my tank. I found this one on amazon for $27. Does anyone have experience with Finnex? Does anyone have a particular device they would like to recommend instead? My heater is an Eheim Jager 150W.