Hey I haven't been on here in a while but i'm on like my 9th grow. I'm using botanicare nutrients, I have the full line and feed according to the Advanced feeding chart. now these pics aren't the best, I took them on my webcam. I have 1 plant that is yellowing, but that's not my concern. The leaves have black spots on them, not brown. I've never seen the black spots like this... I know brown spots can be Mg def and Potassium Def. But what the hell causes black spots? I know it won't be easy to identify with these pics but does anyone have an idea?