Hesi pH Plus is used to increase the pH level of nutrient solution. The pH level will need to be raised when a more alkaline solution is required. Hesi pH Up contains potassium hydroxide (KOH) 50%. This is a very caustic liquid and should be handled with extreme care. Use Hesi pH up in conjunction with a reliable pH meter to raise the pH level of nutrient solution. Add a little at a time if your nutrient pH is too low in order to raise the pH to the proper level. Hesi Ph Up is available in 1 litre bottles.
