Leaves are looking kinda rough

I’m not quite sure what this issue is that’s on many of my cannabis leaves, PH is 6.5-7.0 im using the auto pot self watering system 6.6 pots, using PH Perfect by Advanced Nutritients ..not sure if I have been over feeding them or potassium/poshorous deficiency, they started as yellow/brown spots now their more of a black color spots. So guess im lost as hell ! Lol Somebody help me !

To me she looks hungry for mobile and immobile nutes and may be dealing with lock out issues for awhile.
Do you water till run off? Are you planning on flowering this plant? A good foliar feed may help correct the issues faster but will need more information to attempt to help fix what's going on in the root zone.