Phal Recovery from Root rot

[IvyLam]

My Phal (in sphag medium) had droopy leaves one day and so I watered it. After checking online I decided to check the roots for root rot. I discovered that it had root rot and so I trimmed the dead roots. Only one root was good and there is one starting to grow. I repotted the phal in coarse bark. The leaves are not as droopy, but one of the bottom leaves has a little bit of yellowing. I cut back the flower shoots in order to help it save energy. I read on the web about the sphag and bag method and decided to do that. Right now my phal is in a zip lock with some moss. Should I cut off the yellowing leaf, or should i leave it be. Is there anything else I can do and is there anything I'm doing wrong? Thank you