This R-7063 CH Standard can be used in place of pool water in the calcium hardness (CH) test to confirm the acccuracy and reliability of your testing methods. The standard solution is calibrated to 200ppm calcium and there are 2 ounces in each bottle. Use 10mL R-7063 CH standard (200ppm) to fill your cylinder before adding 10 drops of R-0010, 3 drops of R-0011L, etc. The expected result is 200ppm.
