Interesting! I think I may have experienced some similar issues. Things will be looking great, and then around mid to late flower, I get weirdness with some of the plants. I'm always running 3-6 different strains for the first time, so it's hard to keep'em all happy with the same nutes and EC. I'm running DTW coco too. Looking forward to finding some keeper strains that I can get dialed in. Thanks again!That's about what I'm at for K:Ca:Mg. 2.7:2:1. I lowered K some since im in DTW coco and was getting weird lockouts towards the end on some of my strains.