Quote Originally Posted by drmrboy2008 View Post
So the way the enclosure is set up is the che is above the warm hide set to 88 degrees to give me my gradient a ross the other side, and underneath the warm hide is the uth. The probe is underneath the substrate only because the tray slides in over the glass. So putting the probe between the glass and uth won't heat the plastic tray enough. Me having it done this way, is it safe to say a few times a day I need to check the tray temp and tweak as needed until I upgrade her to a larger (she grew like for inches in a month), more efficient terrarium that just has one barrier (pvc, or glass) between the uth and substrate?
No. It's not safe. You are not a thermostat. You can't be there constantly checking and adjusting your temperature the way a thermostat would.

Now, if your probe is affixed on the inside of the bottom tray under the substrate, then the thermostat should turn off your heating element before it gets too hot in the enclosure. In your original post, you said that temperatures sometimes get "way higher" than 89 degrees. Exactly how high do the temperatures get?