Hi
@Gmalin105! This looks like a cal/mag deficiency, this may have happened because of wrong pH in your feedings, or too much Potassium. Do you check your pH? I would stop pk13/14 now and give her a good flush for a few days, only plain pH'd water. Then if she's not showing signs of recovery (on new growth) after a week, add some cal/mag to the water and see how it goes. Hope this helps, keep us up-to-date and happy growing 👊