Yes I've looked at the roots the best I could with a microscope. I think it is possibly underfeeding. Like I said I added go calmag to 2 plants and the deficiency hasn't spread to new leaves. I have another set about to enter flower. I'm going to top dress 2 inches of a 1:1 ratio of compost and worm castings at the flip. I'm going to feed every watering. I plan to add the go calmag every other watering as a preventative measure. Does anyone think that using genral organics calmag every other water would cause any problems?