Water culture Vanda

[Irisha99]

Hi guys.
Anybody had any success growing Vanda in full water culture? My husband bought me Vanda last August that I posted about on this forum last year. I was following care instructions but the plant wasn’t doing much of anything and its roots were getting drier and drier. It grew one leaf but it was growing very slowly. So, I put it in a vase and filled it to cover about 1/4 of its roots. And to my surprise it is growing another leaf and two roots (extensions of an old one). Should I cut off the old roots that are rotting in water? How often to fertilize?( I was fertilizing it every 3 days before setting up in water culture). Any other suggestions to make it one happy Vanda ? Thank you