Hay Goober, you ever figure out what this was? I'm leaning more to some fungi called rust. but not 100% peace
oh and by the way it's not spider mite damage , that i know 100% lol
use tap water ph it to around 7 ish and a little clonex solution ( adding any nutes will bring your ph down some) and most of all use a big air stone clones need it... this works super for me, take care man