I'm stressing

I've got a prob, I know you have hurd this a 100 times but here I go anyway. Yellowing leave, with small brown spots on all my plant in both rooms. Half are flowering and the other are mothers. Even my new clones have them. Ph at 6-7 in soil. I flushed them a few weeks ago no change. Just added Cal Mag today. If that doesn't work I am going to flush 2, feed 2, and calmag 2 and see.

Well sounds like a plan..but really for any diagnosis there has to be pictures...

magnesium will sort um