Ph lockout which is giving you all the deficiencies. COCO is a bitch, and I'm slowly learning as I go along, you must never let your coco dry or the issues will get worse as the ph will shift dramatically. Even if you're giving ph'd water doesn't mean your medium ph is going to be the same. Water daily with runoff with your feedshedule. The symptoms of lockout will give you a multitude of issue to look for, you cannot overwater. So I have to ask, coco brand ? If it came from a block, most likely it was salts, so if you didn't was your coco, so you're already at a very high ec. You want the coco to be as natural as possible, keep in mind its almost sterile like with some phosphorus, but other than that, you're going to need cal mag for coco esp with led. YOU DO NOT NEED TO INTRODUCE NEW LIGHT, IT WILL STRESS THEM OUT EVEN MORE. Flush with light nutrient feed, go to the bathtub, 3xpot size worth of phd water, or you could just flush with 3 gallons and see how that works if a flush is too invasive for you. Keep checking runoff ppm and ph, if you don't have a ppm meter, get one, but for now, make sure the ph going in is the same going out. Once the droops is over, you will see newer vigorous growth. Once plants have fully recovered you can introduce new light, but feed regiment must be adjusted for increase wattage. I cannot stress this enough, and sorry for the rant. Coco is not soil, unless amended. COCO is hydroponic, you cannot drown a plant in DWC, but you could suffocate is with lack of oxygenated fertigation. The more you water, the more the oxygen, the more stable the medium ph is. Don't treat coco like soil if it is not amended. Again, sorry for the rant, I hadn't smoked a spliff till a couple min ago.
