Gorilla Glue Auto, Gelato Auto

This week I noticed all plants started the pre-flower stage, I also continued to train plants. Plants hadn't been fed in 4 weeks, so all plants were given a fresh topping of; CAL-MAG (1ml), VEG 4-4-4, BLOOM 2-4-8, WORM CASTINGS (3TBSP) . I also PH'd the water to around 6, to prevent nutrient lockout. I noticed slight yellow/brown spots on one GELATO 1 plant, not entirely sure what caused it but growth seems quite strong. Fingers crossed the new feed helps it recover. Light increased to 18.