Red Sea’s Coral Colors Pro Kit includes advanced tests for the high accuracy measurement of iodine, potassium and iron. All of these elements are associated with many biological functions, including coral pigmentation. This test kit enables accurate dosing of three of the Coral Colors Supplements range, which are part of the compete Red Sea Reef Care Program. Iodine – 0.01 ppm accuracy, 0-0.09 ppm range, Colorimetric test, 50 tests. Potassium Pro – 3 ppm accuracy, 150-450 ppm range, Titration test, 40 tests. Iron Pro – 0.05 ppm accuracy, 0-0.5 ppm range, Colorimetric test, 50 tests.