Hi
@SAC87! My guess is that you're experiencing deficiencies due to a miscalibrated pH-pen, meaning you did water with a wrong pH for a few weeks. In coco, sticking to the ideal pH-range is the key, 5.5~5.9 is what you want, if you're under/over this range you will certainly encounter deficiencies, such as copper and potassium. Give her a good meal with a reasonable amount of blooming nutrient and a correct pH, she should be fine, affected leaves won't recover but you will boost her bud production for the last days before the flush. Hope this will help, keep us up-to-date and happy growing 👊