Use Canna Hydro, a two-part A & B nutrient formula for plants grown in rockwool, grow cubes, Hydroton and other similar inert mediums where the required nutrients must be added to the irrigation water. The nutrient was formerly called Substrata, but its name has been changed to highlight when it should be used. Hydroponically grown plants are completely dependent on nutrients that are added to the irrigation water. Formulated with the optimum quantities of specific nutrients required for fast-growing plants in non-recirculation "run-to-waste" systems, Canna Hydro ensures large yields by precisely controlling the supply of nutrients during the growth and flowering stages of fast-growing plants. The result is maximum yields, high potency and a full round taste! Rich in elements like potassium, phosphate and chelate trace elements that are easily absorbed, Canna Hydro Flores ensures a perfect bloom for your plants.