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pH | ppm | EC | Instruments

  • GH pH Test Kit 1 oz

    Original price $9.59
    Original price $9.59 - Original price $9.59
    Original price $9.59
    Current price $5.93
    $5.93 - $5.93
    Current price $5.93

    General Hydroponics® pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and obs...

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    Original price $9.59
    Original price $9.59 - Original price $9.59
    Original price $9.59
    Current price $5.93
    $5.93 - $5.93
    Current price $5.93
  • Out of Stock

    GH pH 7.01 Calibration Solution 8 oz

    Original price $9.03
    Original price $9.03 - Original price $9.03
    Original price $9.03
    Current price $4.31
    $4.31 - $4.31
    Current price $4.31

    General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl...

    View full details
    Original price $9.03
    Original price $9.03 - Original price $9.03
    Original price $9.03
    Current price $4.31
    $4.31 - $4.31
    Current price $4.31
    Out of Stock
  • Out of Stock

    GH pH 4.01 Calibration Solution 8 oz

    Original price $9.03
    Original price $9.03 - Original price $9.03
    Original price $9.03
    Current price $4.92
    $4.92 - $4.92
    Current price $4.92

    General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl...

    View full details
    Original price $9.03
    Original price $9.03 - Original price $9.03
    Original price $9.03
    Current price $4.92
    $4.92 - $4.92
    Current price $4.92
    Out of Stock
  • Out of Stock

    GH pH 7.01 Calibration Solution Quart

    Original price $25.75
    Original price $25.75 - Original price $25.75
    Original price $25.75
    Current price $13.95
    $13.95 - $13.95
    Current price $13.95

    General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl...

    View full details
    Original price $25.75
    Original price $25.75 - Original price $25.75
    Original price $25.75
    Current price $13.95
    $13.95 - $13.95
    Current price $13.95
    Out of Stock
  • Out of Stock

    GH pH 4.01 Calibration Solution Quart

    Original price $25.75
    Original price $25.75 - Original price $25.75
    Original price $25.75
    Current price $13.95
    $13.95 - $13.95
    Current price $13.95

    General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl...

    View full details
    Original price $25.75
    Original price $25.75 - Original price $25.75
    Original price $25.75
    Current price $13.95
    $13.95 - $13.95
    Current price $13.95
    Out of Stock
  • Out of Stock

    GH 1500 PPM Reference Solution 8 oz

    Original price $5.99 - Original price $5.99
    Original price
    $5.99
    $5.99 - $5.99
    Current price $5.99

    Original price $5.99 - Original price $5.99
    Original price
    $5.99
    $5.99 - $5.99
    Current price $5.99
    Out of Stock
pH/EC Maintenance