Viagrow Complete Ph Testing & Adjusting Kit

The Complete pH testing & adjusting kit comes with a pH test kit & crystal pH up & pH down. Drops are reliable & simple to use to give an accurate pH reading of your fertilizer solution or reservoir. Fill the test tube about halfway with the solution you are testing, then add a few drops of the pH test indicator & observe the resulting color. Red (acidic) indicates that the pH is too low, blue (alkaline) indicates that the pH is too high, a yellow to a yellow-green indicates an ideal pH. Add the adjusting crystals as needed to lower or raise pH.