Urgent question for newbie

[indyorchid]

(pics in album)

I recently came into two Vanda Orchids. Both were highly neglected, dry roots, but the leaves were still green.

I have started soaking the roots 3-5 times a day, while I learn how to properly care for these amazing plants. Now I am seeing brown and black spots on the plant, it seems to be spreading. I really would like to save them but I have no idea where to start.

I would like to try and nurse them back to full health. I have been doing an insane amount of research to attempt to learn the proper ways of caring for this type of plant.

Zone 5b

My question is, what exactly is wrong with these plants and how do I save them. I have pictures of them in my album



Thank you so much for your time in advance