A couple of things could be helpful
1) You should apply a fungicide. Possibly soaking the plant for 10-15 minutes would be helpful.
2) You could buy liquid seaweed extract and seaweed extract or KLN would help in simulating root growth. read the instructions carefully on the container and use accordingly.
3) glass beads is not that useful medium. you should possibly get sphagnum moss and allow the plant to grow roots in spag for few months before you could transplant to a bark or LECA. I have read about chilean sphagnum moss hope it is easier to get there
I am sure others will add