I would say they look fine stop fucking with them and allow them to do thier thing, with all the nutes your blasting them with already I would just stick to what your doing and dont look for more "tricks" if it aint broke dont fix it. You should be able to do another grow and tell us what worked out better for YOU in YOUR spot. You look like your doing fine and if I am not mistaken there are no seeds for grand daddy purps so you have done well with the clone and I would not change a thing but increase the nutes as you must know already at a couple of weeks into the flower. Hydro is not very forgiving so I would not change much your doing fine