Sounds identical, post photos...except I would say my white spots are sorta yellowish or surrounded by yellowishness and this stuff looks like a disease - like the way a rash would spread. I made sure to clip all of that off [After posting the photos, it looks like it may be spreading]. And the black stuff on mine...I dunno what you mean by stringy, but mine is like sorta thick and sticky almost like hash (no I'm not smoking it lol). My first thought was mold but I've had a million answers. Mine is located mostly at the very bottom but looks like it's creeping up. Also, some newer growth around the infected area has become sort of papery or wrinkley, like the back of your grandma's hand. There is a photo of this. I bought this stuff called No Tolerance by Ed Rosenthal. It's supposed to work for all kinds of bugs and for mold and mildew and a few other things I can't think of. Basically everything. I have to wait a few days to see how it works on the two leaves I tried it on. I'll let you know how it works. Ima subscribe to this thread and you post anything you find out, too. Okay? Readyyyy BREAK
Oh shit. Iimportant for comparison. What's your humidity, temp, nutes, medium, environment? Mine is 53-65% mostly, 74-81, Botanicare Pro Gro 3-2-4, Fox Farm Ocean Forest. My pH and PPM are decent, not great.