Insta-Test 4 Plus, Swimming Pool and Hot Tub Test Strips (50 Strips) Great for Hot Tubs or Spas!
The Insta-TEST 4 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, and Total Hardness 0-800 ppm. This test strip is a dip-n-read strip with instant results. Each bottle includes 50 test strips packaged in a waterproof bottle with a hinged cap.
The bottle has a moulded desiccant liner, which protects the strips from moisture and UV light.