7 weeks into first grow. In coir, been using PHd bat guano tea and worm casing tea. PH is 6.5 at drain off but 3 of four plants are light green and slow growing. I decided to switch to GH flora trio and Cal Mag to see if I can get them all healthier be for going 12/12. My question is, can I combine all 4 (trio&CalMag) all together in one gallon jugs of water then pH it to apply all at one watering?