General Hydroponics pH Test Indicator, 8 oz 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. This General Hydroponics concentrated pH test indicator is simple to use and offers results that are easy to read. Three drops of pH Test Indicator for every five milliliters of solution will determine the acidity or alkalinity of a plain water sample or nutrient solution; the resulting color of the sample corresponds to the pH chart included on the bottle. Use 3 drops per 5ml of solution.
