This Taylor Residential Series DPD swimming pool and spa test kit is easy to use and provides fast, accurate readings. It tests for Free and Total Chlorine (.5-5 ppm), Bromine (1-10 ppm) and pH (6.8-8.2 ppm), Acid Demand and Total Alkalinity. It features an easy-to read comparator with molded fill lines, .75 ounce reagents, and user-friendly, color-coded instructions. The flip side of the instruction card has dosage charts so you can translate test results into treatment.