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    $269.99
    Hanna Ph/EC/TDS/Temperature Portable Meter, Range: Ph 0.0 To 14.0 Ph EC 0.00 To 4.00 Ms/Cm TDS 0 To 1999 Ppm (Mg/L) - HI9813-51
    Hanna Instruments
    $269.99
    Hanna Ph/EC/TDS/Temperature Portable Meter, Range: Ph 0.0 To 14.0 Ph EC 0.00 To 4.00 Ms/Cm TDS 0 To 1999 Ppm (Mg/L) - HI9813-51
    Hanna Instruments
    $279.99
    Hanna Ph/EC/TDS/Temperature Meter With CAL Check - HI9813-61
    Hanna Instruments
    $279.99
    Hanna Ph/EC/TDS/Temperature Meter With CAL Check - HI9813-61
    Hanna Instruments
    $24.99
    Hanna Marine Ph Checker Calibration Check Set - HI780-11
    Hanna Instruments
    $24.99
    Hanna Marine Ph Checker Calibration Check Set - HI780-11
    Hanna Instruments
    $1,185.50
    Oakton Test Meter, Ph/ORP/TDS/Conductivity/Salinity: Handheld Meter Kit, -2.00 To 16.00, 0 To 200 Ms Model: 35660-26
    Grainger
    $1,185.50
    Oakton Test Meter, Ph/ORP/TDS/Conductivity/Salinity: Handheld Meter Kit, -2.00 To 16.00, 0 To 200 Ms Model: 35660-26
    Grainger
    $4.90
    $13.48
    API Pond Wide Range Ph Test Kit 160-Test Pond Water Test Kit, 1 Count
    Chewy.com
    4
    63% off
    $4.90
    $13.48
    API Pond Wide Range Ph Test Kit 160-Test Pond Water Test Kit, 1 Count
    Chewy.com
    $314.21
    Lamotte Ph/TDS/Salt Meter: Handheld, 0.00 To 14.00, 0 To 99.96 Ppm/100 To 999 Pm/1.0 To 9.99 Ppt Model: 1766
    Grainger
    $314.21
    Lamotte Ph/TDS/Salt Meter: Handheld, 0.00 To 14.00, 0 To 99.96 Ppm/100 To 999 Pm/1.0 To 9.99 Ppt Model: 1766
    Grainger
    $1.90
    $2.38
    80Pcs Ph Test Strips For Water Quality Testing - Accurate 1-14 Pht Levels For Aquariums, Cosmetics & More
    Temu US
    20% off
    $1.90
    $2.38
    80Pcs Ph Test Strips For Water Quality Testing - Accurate 1-14 Pht Levels For Aquariums, Cosmetics & More
    Temu US
    $1.55
    $1.63
    80-Count Aquarium Ph Test Strips - Water Quality Test Paper For Fish Tanks And Ponds, Accurate Ph Balance Testing Tool For Aquariums - Suitable For
    Temu US
    $1.55
    $1.63
    80-Count Aquarium Ph Test Strips - Water Quality Test Paper For Fish Tanks And Ponds, Accurate Ph Balance Testing Tool For Aquariums - Suitable For
    Temu US
    $117.07
    $118.25
    Oakton Ecotestr Ph2+ Pocket Ph Meter
    Test Equipment Depot
    $117.07
    $118.25
    Oakton Ecotestr Ph2+ Pocket Ph Meter
    Test Equipment Depot
    $3.60
    100-Pack Professional Ph Test Strips With Control Card, Water-Soluble Cosmetic Soil Acidity Test Paper - Precise Ph Measurement For Home, Aquarium,
    Temu US
    $3.60
    100-Pack Professional Ph Test Strips With Control Card, Water-Soluble Cosmetic Soil Acidity Test Paper - Precise Ph Measurement For Home, Aquarium,
    Temu US
    $185.48
    Extech Waterproof Palm Ph Meter: 0.00 To 14.00, Auto Temp Compensation, 32 To 212, Dual Line LCD, +/-0.01 Model: PH220-C
    Grainger
    1
    $185.48
    Extech Waterproof Palm Ph Meter: 0.00 To 14.00, Auto Temp Compensation, 32 To 212, Dual Line LCD, +/-0.01 Model: PH220-C
    Grainger
    $12.98
    $18.28
    API Ph Freshwater & Saltwater Aquarium Test Strips, 25 Count
    Chewy.com
    1
    28% off
    $12.98
    $18.28
    API Ph Freshwater & Saltwater Aquarium Test Strips, 25 Count
    Chewy.com
    $19.25
    Test Ph Spill Stick 0-13 Ph
    Level 7 Chemical
    $19.25
    Test Ph Spill Stick 0-13 Ph
    Level 7 Chemical
    $348.50
    Testo 206 Compact Ph Tester For Liquids Starter Kit, Ph1
    Globaltestsupply.com
    $348.50
    Testo 206 Compact Ph Tester For Liquids Starter Kit, Ph1
    Globaltestsupply.com
    $4.49
    $13.28
    API High Range Ph Fresh & Salt Water Aquarium Test Kit, 160 Count
    Chewy.com
    1
    66% off
    $4.49
    $13.28
    API High Range Ph Fresh & Salt Water Aquarium Test Kit, 160 Count
    Chewy.com
    $123.00
    Oakton WD-35634-30 Phtestr 30 Ph Tester, For Temperature
    Amazon.com
    28
    Free shipping
    $123.00
    Oakton WD-35634-30 Phtestr 30 Ph Tester, For Temperature
    Amazon.com
    $265.04
    Apera Instruments, LLC-AI501 PH700 Benchtop Lab Ph Meter, 0.01 Ph Accuracy, 1-3 Points Auto Calibration, 3-In-1 Ph/Temp. Electrode
    Amazon.com
    157
    Free shipping
    $265.04
    Apera Instruments, LLC-AI501 PH700 Benchtop Lab Ph Meter, 0.01 Ph Accuracy, 1-3 Points Auto Calibration, 3-In-1 Ph/Temp. Electrode
    Amazon.com
    $20.99
    Hydrion Ph Test Paper 5.5-8.0 Ph Test
    Level 7 Chemical
    $20.99
    Hydrion Ph Test Paper 5.5-8.0 Ph Test
    Level 7 Chemical