Preserved sheet moss is the medium that covers every moss wall that you can buy from me.
It has no light or water requirements as it is fully dried and preserved and will remain in its current state.
There are a couple of methods to preserve sheet moss, I opt for a slightly stronger but longer lasting combination of denatured alcohol, glycerin, water, and dye. By preserving my own moss I can keep end costs down, but more importantly I can be sure of the finished quality, thoroughly clean all the moss before adding chemicals, and mix my own dye combinations to get the green variations I like best.
Please do not try preserving your own moss at home without proper research and set up!