I have eco earth (brick) that I made and put into my vivarium. Ventilation is good, for it has a screen top. I noticed that in some areas white fuzzy mold is growing on the dirt for no apparent reason. The frogs don't poop in those areas or anything, so thats not the cause. I also notice that the mold is growing everywhere on the rest of the unused batch_ which I left in a bowl open to air for a couple of days. What is this and is it dangerous? How do I get rid of it?