potassium humate good price, good service, good payment, delivery time immediate The Pot. Humate we produced has Gruanle and Powder two types. Both are soluble in the water. The contents can be adjustedProduct Description 1)Specification Appearance: Shining black column Diameter: 3mm, Length: 2-5mm Water-solubility (dry base): 100% Humic acid (dry base): 60% Potassium content (K2O): 8-10% pH: 9- ...