This test kit uses a color chart that measures Copper and Iron levels at 0.1, 0.3, 0.6 and 1.0 ppm. The test kit is simple to use - just add 3 drops of Copper reagent to a 5 mL test tube of water then match the color reaction to the color chart. The Iron test is measured by adding 5 drops of Iron reagent along with an Iron TesTabs tablet to a 5 mL test tube of water then match the reacted sample water with the color chart. Included with the kit is an easy to read diagrammed instructions, test tubes, color chart and enough testing reagents to measure 50 tests.