Gh Booster Raises General Hardness (GH) in soft water and RO water sources. Ratio 1:3:3. Contains 1 part Magnesium sulfate (MgSO4) 3 parts Potassium sulfate (K2so4) and 3 parts Calcium sulfate (CaSO4) which are essential for protein synthesis, root and lignin development and nutrient transport.