Your Neo looks a little bit too low into the moss. Traditionally, Neos are potted at the top of a mound of sphagnum moss. The crown of the Neo--where plant and roots begin--should be right above the sphagnum. Your Neo and Phals would enjoy plenty of fresh air, as advised earlier, mold loves stagnant air, especially stagnant and wet air. Here is a picture of my most recent Neo acquisition, notice how the plant is potted?