Some unknown problem

These ladies are desperate for a balanced bloom nute AND some extra PK... Most of the photos here are showing a potassium deficiency that is quite advanced. Ah... just looked at what I THINK is your diary for this grow - Sugar Bomb, yes? Boy, the plants look vastly underfed but your EC is very high - maybe too high at this point? I'd move that down a bit to 1.6 or so... and calmag is probably not needed and can actually do some harm if used too much or too frequently.. 1tsp/gallon per week is max... but I don't really think you NEED to use it since the problems here are neither calcium nor magnesium... AH!!! The other BIG piece of the puzzle here is that you're growing in coco... you need to get your pH down! Take it down to 6.0 max and I think you'll find the nutes you're giving her will be better absorbed... I think THAT'S your biggest problem here... Hoping others chime in here ... good luck!