GH Ph Test 1 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 & 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 & ease of use, which are important factors when the health of a valuable crop is at stake. Use 3 dropsper 5 ml of solution.