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Gh Booster is a 1:3:3 mixture of Magnesium Sulfate ( MgSO4), Potassium Sulfate ( K2so4) and Calcium Sulfate (CaSO4) essential for protein synthesis, root and lignin development and nutrient transport. Raises General Hardness (GH) in soft water and RO water sources.
1 tsp into 10 gallons will add 2dGH
Soluble Potash(K2O) 22.3%
Information regarding the heavy metal content of this product can be found at Association of American Plant Food Control Officials