Armor Si, that is silica, liquid Koolbloom 0-10-10 and dry Koolbloom ripener 2-45-28 and I think they make the best ph up and down. CaliMagic works fine too. Those two bloom boosters are the best around. They work in conjunction. The liquid from start to finish, and you add the dry the last 2-3 weeks. The liquid has fulvic acid and vitamins. Scott's Superbloom 12-55-6 is there with them on performance.