Mistake on my part. We're using Zilla Jungle Mix, not the Forest Floor.
And an observation this morning - the air temps are holding steady at 91/82 with the humidity at 57% on the cool end. However, this morning we checked the surface temp of the soil under the hide on the hot end (where the yet to be named BP has been camped for a day and a half) and it registered right at 85F. With that, how critical is it to have the surface temp in the low 90's? Outside the hot hide the surface temp of the soil varies between 90 and 92; is it a must to have the low 90's at his belly under the hot hide?
The ambient temp of the room swings between 75 and 77 from morning to afternoon, so we'll check under the hide again this afternoon when the room is warmer but I do not expect to find much, if any, of a difference. If the 90s are needed at his belly in the hide we'll be getting a thermostat ASAP.