Ph control kit contains ph up which add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level, Contains pH down which uses food grade phosphoric acid to lower the pH to the proper level and also contains pH test indicator fill a test tube halfway with nutrient, add a few drops of ph test indicator and observe the coloration of the liquid in the test vial. Use 3 drops per 5ml of solution. Measures 4.8-inch length by 2.7-inch width by 5.8-inch height.
