The leaves of your Phalaenopsis appear to be a bit wilted. That may be from it being too wet previously. Be sure the top 1-2 inches of sphagnum moss feels dry when you poke your finger into it before you water again.
Agreed, no peroxide.
Bark chips and sphagnum moss are different, but equally good potting media for Orchids. Bark chips may be better if you tend to be heavy-handed with watering, but sphagnum moss is easier to determine moisture content. Your choice.
