I have a friend that I mentored a little in growing autos. I got him onto Floraflex like I use. I do not use autopots, though I must admit they look appealing. Anyway, he gets monster plants. But he also has the issue with brown spots on pretty much every grow. He wanted to dump more calmag. I told him no, no, no! But he's also in another state. So it's really hard helping him diagnose long distance.