Coir MAX VitaLink Coir MAX is an advanced yet easy-to-use coco coir formulation that is scientifically proven to deliver excellent plant results. VitaLink Coir MAX?has been developed specifically for the unique properties of coco coir media and contains a key level of all elements including added EDDHA (increases iron availability) and fulvic acid (aids nutrient uptake).Coir MAX A+B set: Two part complete plant feed formulated for maximum growth in coco coir media. Should be used from week 1 of vegetation right until flowering week 8. Formulated for soft water and hard water locations. Available in 1L, 5L and 10L bottles. Dosage: Young plants = 1-2ml/L. Mature plants = 3-4ml/L. Simply add the VitaLink Coir MAX?two-part product to your feeding schedule using the recommendations found either above, on the bottle or the VitaLink feed charts and watch your plants grow and bloom.