Both the whites and the greens get along very well. I've spent hrs at a time watching them interact with each other to make sure there wouldn't be any problems. I've never seen any territorial clashes or dominance issues. They usually sit right next to each other, or seek each other out. My youngest green actually follows my blue eyed white around, they soak in the dish together, sit together... i thought it was kind of strange. But, neither of them demonstrated any hostility towards each other, nor do the whites attempt to make a meal out of the greens. Every frog eats, the whites are obviously more outgoing in regards to feeding, but the greens always get there fill and are not pushed around. I wanted to separate them for space issues because the whites are getting bigger, and I didn't want any issues to arise if there attitudes should change with maturity.
What is Lexan? is it like plexi glass? My biggest problem would be keeping the humidity at a stable level, not so much keeping it high. Im thinking the repti-fogger would be the way to go.