It can be tricky to fix ambient temps in a tub if the room temperature is low. While a second UTH would be great for increasing the belly heat on the cool end (which will also drop when ambient temp is low), it will not do anything for the ambient temps.
The easiest fix is to use an oil heater to warm up the entire room, but if this isn't possible, the next best option would be to set up a ceramic heat emitter for the tub. There is a very thorough tutorial on how to do that here: http://rainbowsnakes.tumblr.com/post...ial-part-three
As for how long the boa can stay in the tub I'm not sure as I don't have any experience with that, but I'm sure someone else will be able to help you!
Reply With Quote