6-Way Swimming Pool & Spa Chemical Test Strips
HTH, 6 Way, Test Strips, Test For Cyan Acid & Calcium Hardness. Easy to use, HTH 6-Way Swimming Pool & Spa Chemical Test Strips fromArch Chemical test for free chlorine, bromine, pH, total alkalinity,total hardness and Cyanuric acid and require only one dip in the waterto read all 6 pool variables.