The Insta-Test 4 pool & spa strip measures Free Chlorine 0-10 ppm (or Bromine 0-20 ppm), pH 6.2-8.4, Total Alkalinity 0-240 and Total Hardness 50-800 ppm. This test strip is a 1-Dip method designed to match the way strip users actually test water. Just dip and read to get truly instant results---only by Insta-TEST! No swirling or waiting times, the new Insta-TEST 1-Dip formula feature extremely stable color reactions without cross-contaminated pads. 50 strips included.
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