Wait until after the Phalaenopsis blooms, in spring or summer, to repot it.
Remove the mini Phalaenopsis from its pot and use your fingers to remove the old potting medium from the roots.
Use sterilized scissors or pruning snips to snip off dead and rotten roots.
Mound some of the fresh fir bark in the center of the bottom of the new pot. Spread the Phalaenopsis' roots over the mound so they hang down evenly around the mound.
Fill the pot with fir bark, pressing firmly on it as you fill. Allow the crown of the orchid – where the roots meet the main stem – to sit just at the surface of the planting medium.
Place the mini Phalaenopsis in a shady spot and don't water it for at least one week, then water until the bark is soaked.