Hi Lisa, I had issues growing Phalaenopsis for a long time until I read that they need to be watered more often than other types of orchids, due to the fact that they don't have storage "bulbs" to hold moisture as other types of orchids do. It looks like your Phal is planted in a bark mix, which is fast draining and allows good air circulation but it also helps the roots to dry out very quickly so your plant may be in need of moisture. Here are a couple of bulletins from the American Orchid Society regarding Phalenopsis culture and care:
http://www.aos.org/orchids/cul...
http://www.aos.org/orchids/cul...