Leisure Time Spa Test Bromine Spa Test Strips 50 count (45005A) Keep your spa water balanced by making sure it is within the following recommended ranges: pH 7.2-7.8, total alkalinity 80-120 ppm and calcium hardness 150-400 ppm Available for chlorine and bromine sanitizing systems For more than 25 years, Leisure Time has been the premier name in spa water care Bromine test strip Quick and easy to read Easy to use Accurate spa water testing Compatible with bromine and ozone systems