Hello there, I use the GHE line of products as well, but in soil. You're in coco, doses are slightly different, but the answer is the same. This early on, I don't feel the high amounts of nutrients are necessary and this could certainly be why she's dipping out. The color and specking of your lower leaves I believe to be a Calcium and/or Phosphorous lockout. I've run into it more then once, myself and calimagic is the answer. You have already applied this and it should help pull back the spread and symptom's you're seeing. However, if you have a pH mal-adjustment, this will need to be addressed first. Keeping your pH at 6.0-6.2 will help your girls pick up the nutrients they are lacking while stopping the fast intake of macro/micro nutrients you don't want.
Long and short of it is this. There looks like a Cal deficiency that was caused by a toxicity locking out that Cal (it was probably still getting some but not everything she needed). Highly suggest testing your reservoir pH consistently, backing off the heavily concentrated GHE nutes and letting her balance out her pH before upping the doses. Keep on the calimagic, this will not hurt them, and it appears that's what she wants right now. When all is said and done, those affected leaves won't come back, but all new growth should show NO new signs or symptoms of toxicities or deficiencies. This may take a little bit of time, but I fully trust it will balance out and your new growth will be un-affected.
If you'd like to speak further about this issue or the GHE line of products, please throw me a PM and I can share my experiences with GHE in more detail. Cheers and don't panic! All will be well.👍😉