Quote Originally Posted by Randall L Turner Jr View Post
I'm going to bet the size RHP he suggested for the size enclosure you are using will allow you to do away with both under tank heaters. The way I have my thermostat probe mounted for RHPs is drilled through the back and hanging several inches below the surface of the heat panel. Then I have the thermostat set to 86, and it provides a hot spot of 89-90. you will of course want to tinker a bit with your personal setup to get it dialed in how you want it.
Obviously I've got a lot to learn. So an RHP can control surface temps? If it's hanging from the ceiling, I don't understand how it can keep an ambient temp in the low 80s but a hotter temp below in the 90s (surface temp) and how is the temp gradient created (shifting the RHP to one side??) You mentioned your thermostat is set to a lower temp then what is actual measured?? Appreciate the response. I'm def curious about this one.