Pool Master test kit combines several tests into a single test kit. The test kit includes tests for alkalinity (20 to 400 mg/L), free and total chlorine (0 to 3,4 mg/L), hardness (20 to 400 mg/L), and pH (6,6 to 8,4 mg/L) and specialised tests for total alkalinity, calcium hardness, and cyanuric acid.