Bionova MgO 10 Magnesium Mineral Additive, 20 LiterMagnesium 10% Food grade minerals Concentration 1: 3000 NPK 6 0 0 + 10% MgO Magnesium deficiency agent Bionova MgO 10 is a food grade mineral fertilizer 10% magnesium. Bionova MgO 10. Magnesium is essential for photosynthesis and forms the reactive nuclei in the chlorophyll. Bionova MgO 10 is mostly used when a deficiency occurs. When using Bionova's main fertilizers and stimulators, there is always the right amount of Magnesium, except when