Is my phalaenopsis healthy?

[Pseast]

Hi there,

I have a seemingly happy orchids, but wasn’t sure about the grey spots that have come up on the roots. I have thought about asking on a forum previously, but decided to see how it goes and the orchid continues to grow, send off new roots, flower and the pseudo bulb and leaves are generally not affected. Just curious if anyone can shed more specific info on this. Are the roots Ok? Is it rot? I have it in a different medium that the usual and it took to it really well, grew a ton… It is a mix of clay that is used to soak up oil spills and such. I got it to try with bansai’s, but thought it may do well for orchids too… Perhaps there is not enough breathing room in the glass case though? No drain holes. I water it after it dries out and don’t leave water resting in it. Any thoughts on this? Is it healthy?

Thanks for your help.

P.s. There are some black spots near the pseudobulb on the roots, but they have been there for as long as I’ve had it, and it hasn’t seemed to have progressed. It still grows an grows…