Thanks,
Rebecca- That is why I was wondering if I would need to leave space in the middle uncovered by the UTH. I am planning on using ultratherms, so hopefullu they won't get too hot even if there is a malfunction. We get warm temps here in spring / summer so hopefully the 2 UTH situation will be temporary. I am hoping to get a rack system next winter (and to have a dedicated herp room) so this will only be an issue for a while.

After quarantine, the BP will be able to move into a vacant 20gl long that is your standard UTH / CHE setup. I will be foiling the top and using a large water bowl to help with humidity, but the glass tanks seem to hold temps much better.

Slim- It was my understanding that in very "short" tubs (i.e. 6") the UTHs have more of an effect on air temps... I was planning on using towels or foam around the sides to help insulate, but I don't want to have to deal with a CHE on a lamp stand like I have over my boa tub. The 6" x 11" were the smallest size ultratherms I could find and seeing as those are safer and don't get as hot as other UTHs, I chose them. I do have an old zoomed pad that is a lot smaller (about 4" x 6") that I could substitute.

Thanks for your advice!