the uth will get the floor of the tub to well over 100 if cranked up, but it doesn't heat the rest of the tub well at all. That's why i'm trying out overhead heat as well, to raise the ambient temps inside the tub. It seems to be working fairly well, too, except for the humidity skyrocketing! lol before i couldnt get enough humidity, and now its WAY too much, sitting around 80! i've just put a smaller water bowl in there, so hopefully thatll do the trick. If not, i guess i gotta put more holes in the tub? Thanks!