Thanks for all the info. I did look at the care sheet before I posted anything, and was pleased to see I'd been doing things right, by and large. I did browse through the vivarium forum a little, and was very impressed at some of the gorgeous set ups people have made. I think I might just have to bite the bullet and experiment with live plants and substrates and see what I can fail to kill, and maybe buy some more springtails.

I actually don't want my frogs to breed, if at all possible, because the grays lay SO many eggs, I just don't have the resources to care for them all -- these guys were born in my late to be opened pool cover last spring. That's far more in the way of gallonage than I can provide for froglets and tadpoles, and I can't bear the idea of killing the eggs before they hatch. I was thinking about making separate tanks for the males and females once I could tell them apart, but I don't know if that wouldn't just cause more stress for the males, being stuck together without any females to help mitigate things... I haven't been able to find anything about that on the 'net so far.

I'm also curious, I know the grays can change color, and mine clearly do -- but they don't seem to have any rhyme or reason to it. None of them have been any shade of green since they were tiny tiny froglets, even though the vast majority of their tank is shades of green. They all seem to prefer various shades of gray, from very dark to nearly white. Does this imply that they're stressed, or the temperature isn't right? I was under the impression from everything I've read so far that they typically try to match their background, and thus /should/ be green at least some of the time.

Thanks again!