Hi Leafgirl, I totally agree with Gin. This type of moss should be used for decoration purposes (if that) certainly not all the way thru out the potted up roots. That type of moss is much to soggy, it's also important to keep ur mix loose for air control or you will see mold, mildew and rotted roots, Bleck!
They're are different things you can use for phals, Orchid bark, coarse sponge rok and charcol. I like spag. moss mixed with coarse rok.