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Calibration, Cleaning & Storage Solutions

  • General Hydroponics pH 7.0 Calibration Solution, 8 oz GH1551

    GH pH 7.01 Calibration Solution 8 oz

    General Hydroponics uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are...

    $27.40
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  • General Hydroponics pH 4.01 Calibration Solution 8 oz GH1541

    GH pH 4.01 Calibration Solution 8 oz

    General Hydroponics uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are...

    $27.40
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  • Hanna Instruments HI70300L Storage Solution,  16 oz

    Hanna Storage Solution, 16 oz

    Hanna storage solutions are prepared with high-grade potassium chloride and potassium hydrogen phthalate by titration with NIST 2201 standardized silver nNitrate and NIST 84j standardized sodium hydroxide solution, respectively. To minimize clogging and...

    $34.75
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  • General Hydroponics 1500 ppm Calibration Solution 8 oz GH1571

    GH 1500 PPM Reference Solution 8 oz

    General Hydroponics uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are...

    $27.82
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  • HM Digital Meters HMDC1000 1000ppm Calibration Solution

    HM Digital 1000 PPM Calibration Solution

    For optimal performance, recalibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. NaCl calibration solution. Comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner.

    $25.79
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  • SALE
    General Hydroponics GH1552 pH 7.0 Calibration Solution 1 qt

    GH pH 7.01 Calibration Solution Quart

    General Hydroponics uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are...

    Was: $36.89
    Now: $28.34
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  • SALE
    General Hydroponics GH1542 pH 4.01 Calibration Solution 1 qt

    GH pH 4.01 Calibration Solution Quart

    General Hydroponics uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are...

    Was: $36.89
    Now: $26.08
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  • Bluelab Probe Care Kit pH & Conductivity

    Bluelab Probe Care pH & Conductivity

    Everything you need to clean, hydrate and calibrate pH probes as well as clean and test conductivity (ppm/EC) probes. The instrument is only as accurate as the probe is clean. Accurate readings simplify crop management and provide improved growth...

    $38.70
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