Frog Pool and Spa Test Strips 50 PackFrog Pool and Spa Test Strips Frog Test Strips are specially formulated for precise reading of low chlorine or bromine levels plus pH and total alkalinity. For use with Frog Mineral Systems that reduce chlorine or bromine use up to 50%. Pool Frog requires at least 0. 5 ppm of chlorine while Spa Frog requires at least 1. 0 ppm bromine. Frog Test Strips Test For the Following: Free Chlorine 0 3. 0 ppm Bromine 0 6. 0 ppm Alkalinity 0 240 ppm pH 6. 8 9. 0