Advanced Nutrients pH Perfect Connoisseur Coco Grow Part A - 4 LMost coco coir growers rely on a cal mag supplement to prevent nutrient lockout in their garden. But thats only a piece of the puzzle. pH Perfect Connoisseur Coco Grow A + B deliver optimal ratios of chelated iron, so you can ensure this critical micronutrient remains available to your cannabis plants. Combine this discovery with our proprietary pH Perfect Technology and multiple forms of chelation, and you get the worlds most advanced coco coir base