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    $21.99
    $65.00
    Portable Water Quality Tester 5-In-1 Fish Bowl PH Meter TDS Test Pen EC Value Tester Salinity Temperature Measurement
    Banggood
    66% off
    $21.99
    $65.00
    Portable Water Quality Tester 5-In-1 Fish Bowl PH Meter TDS Test Pen EC Value Tester Salinity Temperature Measurement
    Banggood
    $39.97
    Meter Digital Water Quality Tester With Temperature EC PPM For Drinking Water And Leather Case White With Case
    Inspire Uplift
    $39.97
    Meter Digital Water Quality Tester With Temperature EC PPM For Drinking Water And Leather Case White With Case
    Inspire Uplift
    $15.95
    $22.95
    TDS Meter LCD Digital Water Tester For Drinking Water, Hydroponics, Aquarium - Quality Monitoring, EC TDS Tester
    www.fruugo.us
    Free shipping
    30% off
    $15.95
    $22.95
    TDS Meter LCD Digital Water Tester For Drinking Water, Hydroponics, Aquarium - Quality Monitoring, EC TDS Tester
    www.fruugo.us
    $131.15
    Oakton Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.1 Ph, 0.1 Ph Ph Resolution, 3 Calibration Points, Auto Model: 3563405
    Grainger
    $131.15
    Oakton Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.1 Ph, 0.1 Ph Ph Resolution, 3 Calibration Points, Auto Model: 3563405
    Grainger
    $114.22
    $153.05
    Extech (EC500-CL) Exstik 6 in 1 KITCHL/Ph/EC/TDS/SAL/Temp
    shedfriends
    25% off
    $114.22
    $153.05
    Extech (EC500-CL) Exstik 6 in 1 KITCHL/Ph/EC/TDS/SAL/Temp
    shedfriends
    $1.20
    Digital TDS Meter Water Tester, PPM Water Quality Tester Ideal For Drinking Water, Swimming Pool, Aquariums, Hydroponics
    Alibaba B2B
    Free shipping
    $1.20
    Digital TDS Meter Water Tester, PPM Water Quality Tester Ideal For Drinking Water, Swimming Pool, Aquariums, Hydroponics
    Alibaba B2B
    $23.99
    HM Digital (TDS-EZ) TDS Meter-Monitor For "Total Dissolved Solids"
    Isopure Water
    $23.99
    HM Digital (TDS-EZ) TDS Meter-Monitor For "Total Dissolved Solids"
    Isopure Water
    $21.00
    HM Digital (TDS-4) Handheld Digital TDS Meter/Monitor
    Isopure Water
    $21.00
    HM Digital (TDS-4) Handheld Digital TDS Meter/Monitor
    Isopure Water
    $31.40
    HM Digital PH-80, Hydrotester
    Selectum
    $31.40
    HM Digital PH-80, Hydrotester
    Selectum
    $487.14
    $736.00
    OHAUS AB23EC-F Aquasearcher Conductivity/TDS/Salinity Benchtop Meter
    Test Equipment Depot
    33% off
    $487.14
    $736.00
    OHAUS AB23EC-F Aquasearcher Conductivity/TDS/Salinity Benchtop Meter
    Test Equipment Depot
    $26.44
    Ispring White Water Test Kit | AFLT4
    Lowe's
    $26.44
    Ispring White Water Test Kit | AFLT4
    Lowe's
    $730.71
    YSI Pro10 Portable Ph Or ORP Meter, 6050010
    TEquipment
    $730.71
    YSI Pro10 Portable Ph Or ORP Meter, 6050010
    TEquipment
    $130.67
    Hercules 35272 Electronic Ph Tester (Waterproof) | Supplyhouse.Com
    SupplyHouse.com
    $130.67
    Hercules 35272 Electronic Ph Tester (Waterproof) | Supplyhouse.Com
    SupplyHouse.com
    $5.15
    Reading Quick Digital Water Tester Ph Tester And TDS Meter For Drinking Water Hydroponics Aquariums Pools And Filter
    Alibaba B2B
    Free shipping
    $5.15
    Reading Quick Digital Water Tester Ph Tester And TDS Meter For Drinking Water Hydroponics Aquariums Pools And Filter
    Alibaba B2B
    $39.73
    ITS 481199 Complete Home Water Quality Test Kit
    FiltersFast.com
    $39.73
    ITS 481199 Complete Home Water Quality Test Kit
    FiltersFast.com
    $85.00
    Seawater Pro TDS Monitor Handheld
    Seawater Pro, LLC
    $85.00
    Seawater Pro TDS Monitor Handheld
    Seawater Pro, LLC
    $1,491.44
    YSI Proquatro - Portable Multi-Parameter Water Quality Meter, 606950
    TEquipment
    $1,491.44
    YSI Proquatro - Portable Multi-Parameter Water Quality Meter, 606950
    TEquipment
    $41.45
    HM Digital DM-2, Commercial In-Line Dual TDS Monitor
    Selectum
    $41.45
    HM Digital DM-2, Commercial In-Line Dual TDS Monitor
    Selectum