The only NO NITROGEN Calcium Magnesium supplement on the market designed for hydroponic plant nutrient solution. A proprietary blend of calcium and magnesium formulated to help prevent blossom end rot caused by calcium deficiency. Calcium is an important nutrient for fruit and flower tissue integrity and quality. Magnesium is an important component of chlorophyll and helps water and nutrient uptake. The correct balance of calcium, magnesium and other secondary and trace minerals are important for maximum yields. Can be used growing with coco, soil or hydroponically.