Zkittlez OG #1 /r/autoflower BF Grow

@Hexus, it's just odd because Maxi bloom already has a fair amount of calcium,magnesium and sulfur.

@Philindicus, Nutes in are at 6.15ish and runoff is at 6.6ish. She's actually recovering at this point. I did some magnesium sulfate as you suggested and while those top leaves don't look much better, the problem stopped cold and she's packing on bulk. At this point I'm officially calling her "Okay now" Def no lockout because she's packing on flower and still stretching. Topmost layer of leaves is the only effected part of her and she hasn't gotten any worse. It'd be a super weird issue if only this girl had a PH problem or a lockout because all five of the soil grow are in the same soil and are getting the same nute routine, and I'm PHing with the same meter for the other five girls plus the DWC. If any of them were going to be upset about bad PH readings, I'd imagine it'd be the DWC first. At this point she only has three weeks or so anyway, so we could be looking at a combination of things, including a bit of natural fade even, but all of her new growth is lush so I'm guessing it was a non-mobile nutrient. Sulfur, like you pointed out as a possibility, is a semi-mobile right? So she may just not be able to green back up as quickly. She only started going really pale eight days ago and she's only had one feed in between, with the MagSulf.

@Hexus, I think I would give her a flush it could be nutrient lock out. It looks like more than just one deficiency. Check her runoff ppms see how high they are also the runoff ph see if it high. This could be the issue.

@Wandering_Sage666, Oh yes, with pretty awesome results. The grow is pretty interesting all around, too. - growdiaries.com/diaries/26245-lst-vs-natural-sour-crack-experiment

@Philindicus, Didn't see this post! Sorry. Nah, that's the grow room. I built it to grow in. :-D We have 2000 square feet of unused basement so I figured I would build this room as a practice run for completing the whole space.