General Hydroponics pH Control Kit
Contains 8 oz Ph Up (add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level), 8 oz Ph Down (uses food grade Phosphoric acid to lower the pH to the proper level), and 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). Keep out of reach of children.
Does not ship outside USA at this time.