Getting different verdits on these strange spots

[Katsols]

My baby vanda is growing out a new leaf yay, but now that it's opening more i peeked inside and i saw tiny black dots on it, first i thought it was just a bit of the coconut husk that got in there but it wasn't. I did some looking around online and some people say it's from water not drying out from the leaves and others say it's fungus. I have no idea what it really is or what to do.
How do i treat it? some people suggested Dithane - M45
but i currently have garden safe fungicide 3.
picture of the leaf, and how the roots look.. hope roots are ok as well.