Okay it looks like I may have solved the problem. I was using the "aggressive bloom" mix, which is just micro and bloom. I didn't really give them any nutes during veg because the soil was pretty hot and they seemed to be growing at a fine pace with nice colored leaves. So I never really gave them anything from the grow bottle at all. I decided to use the regular bloom mix which includes grow, micro, and bloom. I'm three days in with that and things seem to be improving. I still have the same yellow and brown leaves on the plants that I assume will eventually die off, but they aren't dying at the rapid rate they were and I don't seem to see any new yellow and brown leaves popping up. The trouble plant still looks really bare but is bushing up at the ends of the branches where new growth is. I don't think that one will ever look full again, but as long as it doesn't herm I'll try to harvest something off it. The rest seem to be doing fine again. I'll give it a few more days.