The ColorQ Biguanide Pool/Spa 5 handheld photometer measures five pool and spa test directly on a digital display. The meter will measure the following: Biguanide (0-70), pH (6.5-8.5), Alkalinity (0-250), Calcium Hardness (0-700), and Biguanide Shock (0-160). Included in the kit are enough liquid reagents to measure 144 tests for Biguanide, pH, Alkalinity, and Calcium Hardness along with 50 tablet tests for Biguanide Shock. The ColorQ photometer eliminates the need to determine slight color variations or use look-up tables, thus taking the guesswork out of poolside water analysis. The photometer, testing reagents, and photo-diagramatic, multilingual instructions (English, Spanish, French) are packaged in a compact carrying case for on-site testing.