Wet CalMag - 5 Gallon

Wet CalMag is a Calcium, Magnesium, and Iron supplement designed to complement our 2-part base nutrient formulas. Some plants may require more of these elements under rapid growth and/or developmental phases. This product corrects common deficiencies when using reverse osmosis (RO) water, as well as plants grown in coco coir, rockwool, and/or any hydroponic growing media.