UVB
So, Im no expert, but I like the effect of UVB on my frogs. They get a little less sluggish with a regular dose of UVB, or so it seems. I also seem to get better reproductive behavior, though Ive not got a large enough sample to judge that in any serious way. In any case, Ive had an animal or two who seemed like they were on their way out, or werent eating well. A dose of UVB seems to perk them up. But, keep in mind that people have been successfully raising frogs without it for years.....So, make of it what you want.
I use .22' solacryl as tops. They warp, but only slightly. And, lately, Ive been using 1/4" aluminum channel trim on the edges. Eliminated warping, and looks sort of cool. Allows UV transmission (including UVA, but not UVC), and stays sealed tight. Oh, and I can drill it for misting nozzles (I do trust my misting to an auto system), and dont have to worry about broken glass. So, I like the stuff. Whether or not it actually does anything for the frogs is an interesting, and as of yet unresolved, question. Brent is the first person to have played with this, so he has more info/data/anecdotes than I. But, so far, his intuition hasnt steered me wrong...Plus, its a vital aspect of the husbandry for other animals that I keep, so for me, it seemed like a natural thing to do. I just use a small 18" zoo med and rotate it across tanks weekly. Seems sufficient....