Ok I just got a ReptiTherm UTH for the 55gal tank I have for Hera. But after reading the instructions I am confused. I have seen people mention that placing the water dish over the UTH can help increase humidity, but the instructions say NOT to do that since if any water comes in contact with the glass then it can cause stress cracks.

Is that true? I have a good inch or so of cypress bedding down to help insulate against the heat so she doesn't get burned so I think that is ok. And one last thing, I can't remember which is better: a Rheostat or a Thermostat and what was the difference?