Phal without any roots

[Orquiadicto]

About six or seven months ago, one of my phals started growing a secondary spike. Then all of a sudden, this spike stopped growing and stayed like that for several months. One day I noticed that the spike had tripled. Only two of the three spikes are thriving, but the most curious is that the plant hasn't got any roots left. I noticed that the leaves started yellowing and fell off one after the other, so I decided to take the plant out of the pot and have a look at the roots. They were all rotten and I had to cut them all off. Of course, the three leaves it had left also started shriveling more and more and finaly fell off. But the spikes have continued growing and one of them is even forming bloom buds. Lower on the stem another secondary spike is starting to grow. I mist the stem every day to give it humidity and I've started watering with B1 to see if there will be root grow. Next time I have to water I'll take her out of the pot again, to see if anything is happening down there.
Here are two pictures of it. When I take her out of the pot, I'll post some pictures of the whole plant.