Big bundles of moss defeat the purpose of mounting, which is to insure roots dry out quickly after watering. That is a lot of moss for mounting a phal with healthy roots, let alone a struggling plant. Phal roots in habitat grow on surfaces of branches and moss, not down into moss. People tuck roots into medium only so they fit into pots. People who mount orchids with somewhat low humidity might use a thin layer of moss over a few roots to hold a little dampness on the mount, but most people wouldn't use such a large bundle.
Be sure the moss is almost dry at the center before watering. Your plant got into trouble because it stayed wet for too long. You have chosen a mounting method that will keep it wet longer than other mounting methods.
If your relative humidity is routinely over about 70% in your growing area, you won't need any moss at all. Just tuck the plant into the crevice and water it daily. New roots will attach to the branch and your plant will grow happily.
Last edited by estación seca; 12-20-2015 at 08:35 PM..
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