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17-in-1: Includes pH, hardness, hydrogen sulfide, iron, copper, lead, manganese, total chlorine, residual chlorine, nitrate, nitrite, sulfate, zinc, fluoride, salt, total alkalinity, E. coli
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16-in-1: Includes pH, hardness, lead, iron, copper, mercury, total alkalinity, nitrite, nitrate, bromine, free chlorine, total chlorine, fluoride, chromium, carbonate radical, cyanuric acid
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9-in-1: Iron, copper, nitrate, nitrite, free chlorine, hardness, total alkalinity, carbonate, pH
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7-in-1: Total hardness, nitrate, nitrite, free chlorine, carbonate, pH, total alkalinity
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6-in-1: Total hardness, nitrate, nitrite, free chlorine, carbonate, pH
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5-in-1: Nitrate, nitrite, water hardness, carbonate, pH