I currently have one snake in a tub, I'm using a Exo Terra UTH on it because I had no way of getting flexwatt in time at the time and I had no knowledge on how to use it. My future rack plans include it though .

Anyways my question is, is that is that safe to use on a tub and does it work properly? The current temp on the warm side is around 86F.

Yoshi seems to be doing fine, he regulates himself and is active at night (always trying to escape lol).