Alexandra, is that a B. klaasi?
Oh, and here's a pic of my B. emilia setup (she's in a tank now--this is what she used to be in)
G. pulchripes (old setup) & G. pulchra tub setups
B. smithi setup
Smaller T setups
All my setups are pretty basic. Each tub has a good amount of ventilation too according to the humidity level the species' likes.
I use Sphagnum Peat Moss from Home Depot that's $4 a bag. Has always worked well as a substrate, retains humidity nicely, and is cheap. I usually always provide a hide and/or some kind of fake foliage. And for many of my T's, a simple water bottle cap for the dish.