Okay so this may be an odd question but do phal ariel roots sometimes have fuzzy stuff on them? I don't think it is a mold but I have never seen this on my other phal orchid roots...
I have seen it in one of mine and it was not mold in my case. But it was one that I had washed. I would try a cotton with mild detergent to see if it comes off easily as mold would.
Okay thank u. I just recently repotted into hydroton and sprayed them all w a 3 in 1 to make sure that they did not get sick from repotting, and new media.