BTW, there is a way to get around the small tank & not having enough room for 2 hides: Again, not saying cardboard boxes are very aesthetically-pleasing,
but they can be functional in a pinch. So think about adding a "second floor"- even if you just do it for one side, a flat box (like a cereal box) can be used.
(those half-round tree-bark hides waste a lot of space, too, but they're great in a larger cage for decor) If you use a box over a UTH, you need to cut out
the "bottom" so as not to impede the heat rising into it.