There was an article in Reptiles magazine a few issues back about how to build a tank with styrofoam peanuts. I'd never heard of it before, but apparently some people have. Do a search for the word styrofoam.
i read that artical, ilike the idea but would personaly not do it, i don't like the idea of keeping the plants in there pots, and if you don't want pillow moss, leaves would look kinda bad over sphafnum moss, and with out a real substright, you won't have a lot of that bacteria that helps your tank grow, and also i think after a wile the frogs would dig down to the peanuts, put that just my say, any one elts have idea? also wha tis the web site?