Hello Deborah,
I've got two size tubs, the smal one is 15x11x5.5 inch, the large one is 31x22x7 inch. I have one snakerack and one thermostat. I allso installed a separate thermometer with two probes in an empty small tub. One probe is taped down to the bottom of the tub at the hotspot (90-92F) and the other probe hangs at the cold side (81F).
I will provide the juvenile with Aspen and will look for a pot saucer. At the moment she has a hiding cave (size M) from Exo Terra. I've got nine live hopper mice for her. I'll feed her one next week.
Greets,
Giddy