Also, as far as mold goes, when creating a vivarium how do you avoid mold? Or is it just to be expected? Substrate, wood, plant examples for a mold free environment? And what kind of lighting will be ideal for a small vivarium that would be good for plant life but not mold? Is that even possible? If mold happens, do you have to start from square one or is it still salvageable? Which mold is ok and which mold is a danger?