Hello John, my first post on here

I have a vivarium that I set up for some Litoria chloris (aussie red eyed tree frogs), anyway, after a year or so on there are little bits of soil flaking off the silicon and the plants havent really done very well. I have decided to strip it back and give the enclosure another go. I am curious about how you are able to remove the excess moisture that gathers at the bottom under your LECA? Is it because its not in contact with the soil it doesnt pose a risk?