What can I use to keep the humidity up other than spraying in the tub? For now, I have a large bag of aspen and when I'm done with that, I'll be going with a moisture retaining substrate. My humidity is hovering on 43% - 49%.

I will go for the UTH next week. I see that it's harder with the lamps to keep the humidity and temps straight. For the 66qt tub, how big does the UTH have to be? Mind you, I'm going with the ZooMed UTH since it's readily available for me. I'm a couple of block away from Petsmart.

I'll be using the Rheostat with it for the time being.

My problem right now is keeping the humidity up.