It is no secret that one of the most important components of your system is also unfortunately one of the most unreliable! All heaters eventually go south. Some sooner some later, but always when you least expect it or want it. I wish I could blame this on Chinese low quality control but “NO” that is not the case here. As far back as I can remember & trust me I’m no youngster, this has been the case with all hobbyist grade aquarium heaters. So what can be done to work around this fatal flaw in our hobby other than invent, produce and market a new and reliable heater?
The goal is basically to add a more reliable external thermostatic controller with its own temperature probe to the unreliable one built into the heater. We do this by purchasing an external temperature controller that your heater or heaters will be plugged into, details to follow. This controller will take over the job of deciding when your heater goes on/off.