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Insta-TEST 4 Plus Chlorine / Bromine Test Strips are formulated specifically for hot tub use and suitable for use with all chlorine and bromine based sanitisers.
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
50 strips per pot.More Information