House & Garden Aqua Flakes A&B Nutrient - the complete base flowering nutrient for Quantigo, Mapito, Rockwool, Hydroton expanded clay, Silica Rocks, Hydromite, and Coco bark is especially suited for circulation systems. With smart addition and composition of these nutrients, the nutrient water stays fresh and pure. At the same time, the excellently balanced nutrients ensure an optimal nutrient absorption by the plant.