"Purple stems, leaf stems, leaf veins and stunted growth are a sure sign of a Phosphorous deficiency. Leaves will also tend to be smaller and dark green, and may or may not include necrotic patches. Bud size will be smaller and underdeveloped, as will the root mass. "
I think that for sure has to do with my little runts maybe. But as well with my clone... I guess I will try and give them all a watering with a low amount of some 20-20-20