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    Sponsored
    $20.99
    Hach Total Hardness Test Strips, 0 To 425 Mg/L, 50 Strips/Pk | Cole-Parmer
    Cole-Parmer
    $20.99
    Hach Total Hardness Test Strips, 0 To 425 Mg/L, 50 Strips/Pk | Cole-Parmer
    Cole-Parmer
    $9.99
    Varify 7 in 1 Pool And Spa Test Strips- Easy To Use Water Testing Kit For Pool, Spa, Hot Tub & More - Tester Strip For Water Hardness, Chlorine,
    Amazon.com
    2K+
    $9.99
    Varify 7 in 1 Pool And Spa Test Strips- Easy To Use Water Testing Kit For Pool, Spa, Hot Tub & More - Tester Strip For Water Hardness, Chlorine,
    Amazon.com
    $107.00
    Supelco Total Hardness Test, Colorimetric, Water Hardness 5-25 °D, Water Hardness 6-31 °E, For Use With Mquant Stripscan App, Water Hardness 9-45 °F, Mquant 100 Tests Red | Metal
    Sigma-Aldrich
    $107.00
    Supelco Total Hardness Test, Colorimetric, Water Hardness 5-25 °D, Water Hardness 6-31 °E, For Use With Mquant Stripscan App, Water Hardness 9-45 °F, Mquant 100 Tests Red | Metal
    Sigma-Aldrich
    $26.97
    Varify 17 in 1 Complete Drinking Water Test Kit - 100 Strips + 2 Bacteria Tester Kits - Well, Tap, Home, City Water Testing Strip For Lead, Alkaline
    Amazon.com
    7K+
    $26.97
    Varify 17 in 1 Complete Drinking Water Test Kit - 100 Strips + 2 Bacteria Tester Kits - Well, Tap, Home, City Water Testing Strip For Lead, Alkaline
    Amazon.com
    $99.90
    Supelco Total Hardness Test, Colorimetric, Water Hardness 3-21 °D, Water Hardness 4-26 °E, Water Hardness 5-37 °F, Mquant 100 Tests Red | Metal
    Sigma-Aldrich
    $99.90
    Supelco Total Hardness Test, Colorimetric, Water Hardness 3-21 °D, Water Hardness 4-26 °E, Water Hardness 5-37 °F, Mquant 100 Tests Red | Metal
    Sigma-Aldrich
    $22.14
    Lamotte Test Strip: 0 To 180 Ppm Hardness, Hardness, 50 Tests [PK/50] Model: 2981
    Grainger
    $22.14
    Lamotte Test Strip: 0 To 180 Ppm Hardness, Hardness, 50 Tests [PK/50] Model: 2981
    Grainger
    $20.50
    ITS Water Quality Test Strips, Total Hardness, 0 To 425 Ppm, 50/Bottle | Cole-Parmer
    Cole-Parmer
    $20.50
    ITS Water Quality Test Strips, Total Hardness, 0 To 425 Ppm, 50/Bottle | Cole-Parmer
    Cole-Parmer
    $9.99
    Liberty Gold Standard© Water Test Strips (121-Piece Kit) Testing For Pools & Spas, Hot Tubs - Test Chlorine, Ph, Hard Water Hardness Test, Cyanuric
    Amazon.com
    5
    $9.99
    Liberty Gold Standard© Water Test Strips (121-Piece Kit) Testing For Pools & Spas, Hot Tubs - Test Chlorine, Ph, Hard Water Hardness Test, Cyanuric
    Amazon.com
    $68.10
    Supelco Total Hardness Test, Reflectometric, Water Hardness 0.1-30.0 °D, For Use With REFLECTOQUANT 50 Tests
    Sigma-Aldrich
    $68.10
    Supelco Total Hardness Test, Reflectometric, Water Hardness 0.1-30.0 °D, For Use With REFLECTOQUANT 50 Tests
    Sigma-Aldrich
    $23.00
    Lamotte Insta-Test Hardness Test Strips, 0 To 180 Ppm | Cole-Parmer
    Cole-Parmer
    $23.00
    Lamotte Insta-Test Hardness Test Strips, 0 To 180 Ppm | Cole-Parmer
    Cole-Parmer
    $6,290.00
    Supelco Total Hardness Test, Colorimetric, Water Hardness 5-25 °D, Water Hardness 6-31 °E, Water Hardness 9-45 °F, Mquant 25000 Strips
    Sigma-Aldrich
    $6,290.00
    Supelco Total Hardness Test, Colorimetric, Water Hardness 5-25 °D, Water Hardness 6-31 °E, Water Hardness 9-45 °F, Mquant 25000 Strips
    Sigma-Aldrich
    $100.93
    Lamotte Calcium, Magnesium And Total Hardness Water Test Kit: Handbook, 50 Tests, 1 Pieces Model: 4824-DR-LT-01
    Grainger
    $100.93
    Lamotte Calcium, Magnesium And Total Hardness Water Test Kit: Handbook, 50 Tests, 1 Pieces Model: 4824-DR-LT-01
    Grainger
    $67.20
    Lamotte Total Hardness Water Quality Test Kit: Total Hardness, 50 Tests, 4482-LI-02 Model: 4482-LI-02
    Grainger
    $67.20
    Lamotte Total Hardness Water Quality Test Kit: Total Hardness, 50 Tests, 4482-LI-02 Model: 4482-LI-02
    Grainger
    $42.00
    Hardness Test Kit Pro II
    Clean Water Store
    $42.00
    Hardness Test Kit Pro II
    Clean Water Store
    $7.03
    Iron Hardness Plus Kit
    Home Depot
    83
    Free shipping
    $7.03
    Iron Hardness Plus Kit
    Home Depot
    $68.96
    Lamotte Total Hardness Water Test Kit: Total Hardness, 50 Tests, 4482-DR-LI-01 Model: 4482-DR-LI-01
    Grainger
    1
    $68.96
    Lamotte Total Hardness Water Test Kit: Total Hardness, 50 Tests, 4482-DR-LI-01 Model: 4482-DR-LI-01
    Grainger
    $121.00
    Supelco Residual Hardness Test, Colorimetric, Water Hardness 0.04-0.15 °D, Water Hardness 0.05-0.19 °E, 0.7-2.7 Mg/L (Caco3), For Use With MQUANT 400 Tests
    Sigma-Aldrich
    $121.00
    Supelco Residual Hardness Test, Colorimetric, Water Hardness 0.04-0.15 °D, Water Hardness 0.05-0.19 °E, 0.7-2.7 Mg/L (Caco3), For Use With MQUANT 400 Tests
    Sigma-Aldrich
    $74.27
    Lovibond Calcium Hardness Water Test Kit: Calcium Hardness, Reagents/Sample Bottle, 30 Tests, 414160 Model: 414160
    Grainger
    $74.27
    Lovibond Calcium Hardness Water Test Kit: Calcium Hardness, Reagents/Sample Bottle, 30 Tests, 414160 Model: 414160
    Grainger

    • Water Hardness Test Kit - Easy-To-Use Test Strips