If it is going into a container then I would just use damp paper towels. I used moss at first but I noticed it molds very fast. Thats when I switched to paper towels. I put them inside his caves and keeps it nice and moist. As far as treating the moss im not really sure. Fortunately I have yet to have mite problems but maybe someone will post something soon to answer that question. My advice is to just use paper towels then you will not have that problem.