Phals - new leaves but no new roots

[yousillygirl]

After killing about 10 phals in a row (100% death rate-- very consistent), I made the switch to S/H about 6 months ago. It wasn't the ideal time to switch (no new root growth) but I was desperate and clearly whatever I was doing in sphag wasn't working. While the plants didn't do a 180, things appeared to stabilize and at least no new fatalities.

Last month I also made the switch to MSU fertilizer and what do you know? Everybody's putting out new leaves. In fact one plant is putting out two new leaves simultaneously.

However, there have been no new roots - despite application of KLN on a 3-weekly interval. Everyone mentions the importance of growing new roots adapted to the S/H environment, so I've been watching for signs. Getting a little anxious too, since I know that old roots frequently die when the plant is moved into S/H.

Wondering if anyone else has seen this pattern of new leaves but no new roots?

FYI I'm only feeding with MSU and KLN.

Thanks in advance