Hydro Nutrition A & B has been specially developed for cultivation on hydro systems, where the nutrient solution leaks away from the substrate after irrigation and is not re-used. Hydro Nutrition A & B is widely used in cultivation on rock wool and Maputo. It is a professional bio-mineral nutrition, providing a stable and biological equilibrium of the substrate. In addition, the Hydro A & B nutrition contains almost all the necessary nutrients for the whole growth stage.