ColorQ Testtabs Pro7 photometer directyl measures seven pool & spa test which includes Free Chlorine, Total Chlorine, Bromine, pH, Alkalinity, Calcium Hardness and Cyanuric Acid. The photometer is easy to use and includes 50 TesTabs tablet reagents per test factor packaged in blister-style foil. The user dispenses each tablet into a ColorQ test tube by pressing the tablet through the foil. This eliminates the need to manuall tear open a foil packet and carefull dispense the tablet.