General Hydroponics pH Test Color Match Control Kit Hydrofarm The compact design allows this

The compact design allows this sensor to be easily installed in most applications

RHP certified

Commercial growers rely on this professional-grade solution to maintain consistent quality and high-value results across every harvest cycle

mineral buildup

General Hydroponics pH Test Color Match Control Kit Hydrofarm The compact design allows thisContains 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), 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).