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Easily measure and maintain nutrient strength levels with the waterproof Bluelab Truncheon® Nutrient Meter. This meter reads in EC (0.2 to 3.6), CF (2 to 36), TDS/ppm 500 (100 to 1,800) and ppm 700 (140 to 2,520)
General Hydroponics pH Test Kits make pH testing easy. Simply 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. Many experienced growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use, which are important factors when the health of a valuable crop is at stake. Use 3 drops per 5 ml of solution.