... POTASSIUM HUMATE >:It is black powder or crystal granular, soluble in water and weak alkaline, which perfectly combines humic ... and microbial stimulator.SpecificationITEMSTANDARD INDEXSolubility70%min85%min95%-97%Humic acid(Dry basis)35%min50%min55%min55%min60%minK20( ... Potassium Humate, Sodium Humate, Super Sodium Humate, Humic Acid, Fulvic Acid and Seaweed Extract are all our best-sellers. Refiend ...