I do not ph my water, i do sometimes feed it with a molassas and water mix seeing it as not able to truely harm my plants. I do not foliar feed, i dont think its necassary. My soil is nuted, but i prepared it months before using it, so i wasnt worried about a burn at the start, it seems to be growing just fine, only this strange coloration, no spider mites.
I have looked at the lockout and plant abuse charts, but i could look even more. heres a picture.
sorry for the distance, my cam is being stubborn in getting the detail of the spots.