I have an Exo Terra UTH (specifically this one:http://www.herpsupplies.com/product....091&id=PT-2022) in addition to a lamp, and I still have a hard time keeping my terranium at the ideal temperature (~80 degrees). Does anyone else have similar experiences? Should I use a hotter UTH of the same kind? It would feel sort of strange to use a "desert" UTH for my tropical frog. Are there better UTH's out there?