House and Garden Cocos A 1 Liter (12 Cs) Commercial Humidifier phosphorus and potassium make Grow Water Pumps Aeration & Irrigation phosphorus and potassium make Grow More® Fertilizers the ideal product Calcium (Ca) and Magnesium (Mg) alleviate the potential elemental problems commonly seen in this unique growing media because they powerfully deliver these critically essential secondary and micronutrients to your valuable plants at the most crucial time so you get the optimized yields you desire Coco coir as a medium has unique properties that are distinct from soils and hydroponic media A & B is formulated to provide the perfect ratio of nutrients while taking into account the cation exchange capacity of coir