Indoor Spectrum King closet case and cfl

So I'm having problems with a few plants as you guys can see from the pics, I was wondering it anyone has had problems with purple stems and what deficiency it could be. I've washed all these ladies out twice with plane water after I notice the initial nutrient burn on the leaves but now 3out of 5 of them are getting these dark purple stocks and stems. Mostly on the new grow on the top of the plant. I've looked up deficiency charts and nothing is really specific to the symptoms I've been getting. At the very end of the pictures I'll leave a few pictures for you guys to see what I'm talking about. Any and all advice is appreciated. Thanks guys.