Expensive orchid, white slippery powder on media/roots

[orchidhope]

Purchased expensive online orchid: Phal Al Redsun Queen 'Carribean Sunse' AM/AOS, and received May 27 and it has lanquished since then showing no changes or signs of improvement, still with pale, rather limp leaves so decided to repot in case it was packed too tight in sphagnum moss although the roots looked quite nice with live green root tips. Upon removing from pot, discovered a white powdery lightweight substance on the moss and the actual roots. Removed all of the funky-smellingn old moss, rinsed well, sprayed with hydrogen-peroxide and brushed the white gently from the roots and repotted in looser sphagnum - New Zealand of Chilean. I am caring for 4 seeding orchids and online instructions are clear to say do NOT tamp down moss and I have always been a believer of looser moss for better air exchange (I do use the slotted clear plastic orchid pots.) Wondering what the white was and if I should do more, although it actually looked better already just overnight. Any help or information would be appreciated. I believe I got it in time before any permanent damage was done.

Now for attaching a photo and NOT losing this whole post. This is my 2nd typing of it, and first draft I went to manage attachments, browsed to my photo, selected it, clicked upload, then clicked on it in the thread to view quality and when closing the attachment lost the whole post. I'll pay closer attention and in fact won't click to look at it this time as I don't want to craft and type this a 3rd time. THANKS FOR ANY INFO.