Phal NOID transfered to S/H. What to watch for now?

[Blueszz]

Kind of long, questions below in bold-italic, if you don't want or don't have the time to read the entire post

Two weeks ago I transferred a not so thriving Phal into S/H. In fact it was only surviving, building no roots for almost a year, the last leaf was way to small and in December it started a spike which I removed. The leaves where a bit limp.
I tried several things but couldn't get this baby growing. Despite it had no root growth I decided to try S/H. It was a desperate attempt to nurse it back to health.
During the 2 weeks in S/H all the leaves firmed up again, I had to remove a bit from roots twice but now it seems stabilizing. It already had some black spots along the roots so the roots where in poor shape once I transferred this Phal to S/H. Keep fingers crossed for this NOID Phal. I considder her as my learning project

I always wanted to try a healthy Phal. in S/H. I decided to use a very healthy Phal. NOID, it might be Phal. Anthura Gold. Healthy leaves with a lot of new root growth. I repotted this Phal 2 months ago and was surprised with the new root mass. New roots where thicker than the old roots and non of the roots showed signs of rot. I didn't have to cut a single piece from this plant. Roots where very long and branched. A good start for transferring to S/H I think?
Carefully I cleaned the roots and stem and removed every piece of bark I could remove... soaked it in Superthrive etc.
I found a pot which can contain 1 liter and had difficulties fitting the roots in the pot. Carefully I manipulated the roots in the pot and worked the LECA around the roots.
On the stem I noticed new growths. Two unidentified ones underneath the old (cut) spikes and one new root that was under a yellowing leaf that I removed last week.

I'll watch this baby daily LOL.
Questions:

1. What do I have to look for now she is recently transferred to S/H?
2. Is it beneficial to flush the pot in the beginning more often?
3. Can I use Superthrive in S/H or should I leave that with these healthy and actively growing roots?

Thanks, Nicole