Wedding Cheesecake Fast Buds Contest

This week the plant seemed to show some deficiencies and thought ec could be a bit low so increase to 3/4 strength. 12 wks 4 days - Problem only got worse so I flushed and dropped back down to 1/2 strength. Potassium looking deficiencies and as having to kind of guess when to give what/when with a photoperiod schedule but its been going for 13 wks so figured it must need to be on the last wk of schedule for higher phosphorous and pottasium. Hoping that helps things but again think by trying to counteract the loss of cal/mag into the unbuffered coco i might have locked out potassium. Dropped rate of cal-mag to just small amount totaling 0.4EC before adding nutrients. Plant is looking pretty battered from pests, ive scanned and scanned for caterpillars or slugs and nothing to remove, they are just in and out overnight! Probably not doing it any favors not being the healthiest right now. But hoping it pulls through 🙏🤣