Tributo a Jack Herer

it could very well be lack of calcium and magnesium. you can google "comon lack of nutrients cannabis plants", from the examples shown, this seems CalMag deal.

If you're curious you can check the germination week of one of my 3 latest diaries there is a custom schedule i made for Biobizz nuts with all-mix soil, i my opinion you are starting nuts too high and too soon. A small plant grown under a 150 w don't need as much nutrients as a big plant grown under a 600W or 1000w hps with controlled environnement and with enriched co2 ppm wich are the two factor that make a plant able to consume more nuts (more light coupled with enriched co2 environnement). According to Jorges Cervantes deficiencies and excess chart: https://loudclouds.co/wp-content/uploads/2016/07/marijuana-deficiency-chart-jorge-cervantes.jpg your plant seem to suffer from N and K deficiencies wich couldn't be really the case with high dose of nutrients you giving so i'll bet either on a nutrients or pH lockout.