You really need the UTH with thermostat for her, that's where mine lie when digesting, otherwise they're on the cool side.

A 50-gallon tank is huge for a small BP like that, I would clutter it up as much as possible with fake plants or crumpled up newspaper and some additional hides.

What is the humidity in the tank?

Please tell me that tape in the picture is on the outside of the tank and not the inside.