Use ph Meters to measure acidity and alkalinity of your nutrient solution.
storage and refill solution for PH meters
Kit for measuring PH. Narrow spectrum. 5,6 - 7,4 PH Increments of 0,2 PH
Kit for measuring PH. Wide spectrum. 4,0 - 8,0 PH Increments of 0,5 PH
Digital PH Meter Tester Water LCD Monitor Pen