I would worry about 73° being too cold for a 7" sulcata whether it be inside or outside.Thanks everyone for the input. Here are some thoughts:
I put the sulcata in his indoor enclosure for these extremely cold days (it's 30F outside!).
Just for fun, I decided to "turn on" his outdoor enclosure with all the heating and stuff and cranked the thermostat to 85F and checked back at 1AM. As of now, it's 30F outside but about 73F inside his outdoor night box, which isn't bad at all which is the temperate of his INDOOR enclosure (inside my room).
Either the heat source does not produce enough heat or the box is not sealed well enough to hold the heat in. You could try a more powerful heater and see what temps you can get. The more the heater runs, the dryer the air gets. A 7" sulcata still needs an appropriate amount of humidity for smooth growth.I'm kinda surprised the insulated night box couldn't even get it up to 80F at night, nearly 50F above outside temps, but hey, it's the worst its ever gonna get so it's not too bad.
Now I have two questions:
1. I've been feeding mazuri, but I'm kinda tired of those small pieces. I'm pretty sure I've read/seen about those BIG mazuri pellets...I'm talking like billard ball size....it's much easier to soak one then 7-8 for a daily feed.
2. At what point do I go... "well, it's pretty cold outside, but hey, he's REALLY outgrowing his indoor enclosure, so I need to take him outside even with the heat running nonstop at at around 75F during the night"?
1. Mazuri Tortoise chow comes in 2 formulas. The LS is smallish and darker brown. The Original formula is larger and is light brown or tan colored. Neither is billiard ball size. What you may be seeing is the several pellets of the original formula that has been soaked and formed into a larger ball. I do this sometimes when mixing in other foods with the Mazuri.
2. I would not leave my tortoise outside at night in 75° temps with the heat running all the time. I believe that it will create too dry of conditions for the tortoise.