Stacey, I had a similar experience when switching 3 phals to S/H, did my research, the phals were good candidates as they were growing new roots but they never seemed to like it.
Anyway, long story, one died and I pulled the other ones out of S/H.
Ron (Ron-NY) from the forum advised me to put the surviving Phals in loose sphag in clay pots and they bounced back almost right away, new roots, new leaves and a spike!
Maybe some Phals are better suited for S/H than others, maybe I should have persevered but honestly I am so happy with the growing method Ron suggested.
(Thanks again Ron!)