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

resilience

RHP certified

25 in (235 mm) Housing Fiberglass composite Certification ETL Commercial/Industrial

potting mix

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).