Yes, as mentioned some mistakes have defintaly been made, my coco prep was poor so ive been dealing with high runoff PPMs and high pH for a while (hence the short bushy plants i think) but i think I've gotten that under control recently.I wouldn't touch them. What I would do is pay attention to your leaves...those dark green leaf tips and clawed over little leaves would lead me to believe something is amiss. You may want to double check your pH variables and be sure your nutrients are on point. Good luck.