Phals do put up with repotting while in bloom, just be careful not to bang the flowers around. Bark would be better than spaghnum ... but no matter what, fresh media would be helpful if you want this to be more than a once-and-gone plant. With fresh media, you'll need to pay attention to watering, since it will dry out more rapidly (which the plant will also love) For pests, Bayer's Advanced 3-in-1 includes both insecticide and miticide and is systemic.