Heating and tank help

I ended up having to tear her tank apart. Her log hide started growing black tiny mushrooms and grey/white mold. The more I removed, the more I found. So I stuck her in a dark box with some water while I took her tank apart. Had to throw out most of her climbing branches and her log hide. That's upsetting because she really liked that one. Can't find another one at the moment so I got a bunch of fake plants and made draping areas she can hide under and not be seen. She has 2 hides still, but she hasn't seemed to like them. She can go into them and ball up, they're a tight fit, not super big but big enough.
I was thinking of getting the small fake rock hide from Petco. It comes apart if needed. I didn't know if I should get the big one or small one.

I wish I knew her hatch date, but I don't. I know she ate before I got her but I don't know if she had trouble with feeding. She's a rescue so the info is sparse. Someone suggested she hasn't eaten frozen/thawed before and was fed live. I can't currently find live around me, but I'm still trying. If she were big enough, Petco has feeder mice, but no babies for sale.

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