I've never seen low ph do that... Shit i've never seen that happen period.
Pretty badass looking though, if you don't mind me saying.
Lol, I have no input on this problem (NEVER seen this before) but honestly i'd just let it grow. It'll more than likely fix itself if you do everything right.
Just another phenomenon to the RIU community
EDIT: I'm guessing it's under an LED by the way the carpet looks... try putting a picture up under regular lights so people can get an idea of what it really looks like (the LED is probably making the dots look redish-purpleish.. i'm
guessing the dots will look light brown under regular light