Cutting Edge Solutions pH Up, 1 gal, case of 4Description CES pH Up: This is a concentrated pH adjustment liquid and an alkaline buffer that raises water and nutrient solution pH. Being highly concentrated, it should be used conservatively. Gradually add to pure water or nutrient solution, in small intervals. Take an initial reading and then test pH. Repeat the small application process and stir well, until the desired pH is achieved. The amount of CES pH Up required for adjustment will vary,