I'm running FFOF and their bloom nute right now in my tent, I use 1 tablespoon every other watering, sometimes even less. in general I give them 250ppm feeding twice a week. You rplants has some sort of toxicity, I can guarantee that. stop feeding it man, you have plenty of nutes locked up in that soil... Once I was reading a thread similar to this, The OP was going on about "I've given them a foliar spray of Epsom salts, I've given it this and that and this and that" and someone came in, and he said "Have you tried no doing anything?" That really stuck with me, It made me reconsider my approach to growing. If your plant was deficient it would be lacking in growth, it would be small and underdeveloped. but that's clearly not the case, it's a big bountiful plant... but as you can see it's still yellowing. This to me, is a clear sign of lockout. slowly water the rootball from the center with RO water at your next watering. make sure you get a substantial amount of runoff. cease any and all feeding and just hope that she finishes up. It can be hard to sift through the bullshit man, so I'ma give you a couple great referenced that have helped me out. Full plant lockout will look like all of these combines, which is what this looks like to me.