Hydro Rokz Cocos 60-40 is a substrate made of a balanced blend of clay pebbles and coco fibre. Hydro Rokz Cocos 60-40 offers many benefits for hydroponic growth: the clay pebbles ensure excellent drainage as they retain almost no water, while the coco substrate increases the water retention of the substrate. The added coco substrate keeps the moisture in the root zone at stable levels between waterings. In fewer words, Hydro Rokz Cocos 60-40 is a balanced substrate that maintains some moisture in the root zone, supports healthy root growth and enhances nutrient intake.