FloraFlex Nutrients Cal + Mag + Iron Deficiency Corrector, 55 GallonFloraFlex Cal+Mag+Iron is a Calcium, Magnesium, & Iron supplement designed to complement the FloraFlex 2 part base nutrient formulas. Some plants may require more of these elements under rapid growth and or developmental phaes. The product corrects common deficiencies when using reverse osmosis water, as well as plants grown in coco coir, rockwool and or any hydroponic growing media. Directions for use: Reservoir Feeding: Add 2 4 mL per gallon of