Makes me wonder about why mine is in a pot of Sphagnum...
If the sphagnum is allowed to dry between waterings, it will be fine. (Sphag is not inherently any wetter than anything else, it just holds more water for longer... one can compensate with adjusting watering frequency and airflow, depending on humidity) I have had bad luck with the genus in pots, but then I am a ham-handed waterer. And I am set up for mounted plants.