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General Hydroponics pH Calibration Solutions Control for Hydroponics

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  • "General Hydroponics PH Test Kit, 1-Ounce"

    "General Hydroponics PH Test Kit, 1-Ounce"

    (62)
    $12.99 New
  • General Hydroponics PH Test Indicator 8-Ounce

    General Hydroponics PH Test Indicator 8-Ounce

    (49)
    $15.89 New

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  • General Hydroponics pH Calibration Solutions Control for Hydroponics

Review highlights

Recommended by our customers

  • Easy best way to test pH of water

    By truther445

    I’ve use the strips, and I’ve used other testing devices, but this is the most simplistic and the easiest one. No it doe... see all reviews

    Verified Purchase

    General Hydroponics pH Test Kit 1 oz - hydroponics GH up down combo

  • these drops you can trust..u will get the right reading everytime.

    By ch_1203

    if you cant afford a high end ph meter I highly recommend ph test drops by general hydroponics they have always worked f... see all reviews

    Verified Purchase

    General Hydroponics pH Test Indicator 8 oz Ounces - up down wide spectrum

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22 results

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    • Brand: General Hydroponics- Selected
    • Type: pH Calibration Solution- Selected
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    • Case of 16 Bottles - General Hydroponics pH Test Indicator 8 oz Ounces Lot Of 16 - Image 1 of 3
    • Case of 16 Bottles - General Hydroponics pH Test Indicator 8 oz Ounces Lot Of 16 - Image 2 of 3
    • Case of 16 Bottles - General Hydroponics pH Test Indicator 8 oz Ounces Lot Of 16 - Image 3 of 3

    Case of 16 Bottles - General Hydroponics pH Test Indicator 8 oz Ounces Lot Of 16

    Brand New · General Hydroponics
    (49)
    $112.00
    or Best Offer
    Free shipping
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  • General Hydroponics Standard Reference Solution pH 4.01 - 8oz - Image 1 of 1

    General Hydroponics Standard Reference Solution pH 4.01 - 8oz

    Brand New · General Hydroponics
    $4.99
    $4.99 shipping
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  • General Hydroponics pH Test Indicator 8 oz Ounces - up down wide spectrum - Image 1 of 1

    General Hydroponics pH Test Indicator 8 oz Ounces - up down wide spectrum

    Brand New · General Hydroponics
    (49)
    $15.89
    Free shipping
    751 sold
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    • General Hydroponics Standard Reference Solution 4.01 8oz - Image 1 of 3
    • General Hydroponics Standard Reference Solution 4.01 8oz - Image 2 of 3
    • General Hydroponics Standard Reference Solution 4.01 8oz - Image 3 of 3

    General Hydroponics Standard Reference Solution 4.01 8oz

    Brand New · General Hydroponics
    $12.99
    or Best Offer
    Free shipping
    Only 1 left!
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  • General Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated - Image 1 of 1

    General Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated

    Brand New · General Hydroponics
    (62)
    $18.99
    Free shipping
    112 sold
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  • General Hydroponics PH 7.0 Calibration Solution- Quart - Free Shipping - Image 1 of 1

    General Hydroponics PH 7.0 Calibration Solution- Quart - Free Shipping

    Brand New · General Hydroponics
    $21.95
    Free shipping
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  • General Hydroponics pH Test Kit 1 oz - hydroponics GH up down combo - Image 1 of 4

    General Hydroponics pH Test Kit 1 oz - hydroponics GH up down combo

    Open Box · General Hydroponics
    (62)
    $9.99
    or Best Offer
    $3.88 shipping
    Only 1 left!
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  • General Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated - Image 1 of 1

    General Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated

    Brand New · General Hydroponics
    (62)
    $12.99
    Free shipping
    2 watching
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  • General Hydroponics pH Test Indicator Control Kit 1oz - up down wide spectrum - Image 1 of 1

    General Hydroponics pH Test Indicator Control Kit 1oz - up down wide spectrum

    Brand New · General Hydroponics
    $10.95
    Free shipping
    366 sold
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  • General Hydroponics pH Test Indicator 8 oz Ounces - up down wide spectrum - Image 1 of 1

    General Hydroponics pH Test Indicator 8 oz Ounces - up down wide spectrum

    Brand New · General Hydroponics
    (49)
    $15.99
    Free shipping
    3 watching
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  • General Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated - Image 1 of 1

    General Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated

    Brand New · General Hydroponics
    (62)
    $13.99
    Free shipping
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  • General Hydroponics pH 4.01 Calibration Solution, 1 Qt. - Image 1 of 1

    General Hydroponics pH 4.01 Calibration Solution, 1 Qt.

    Brand New · General Hydroponics
    $14.00
    $5.00 shipping
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  • Lot 2 Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated - Image 1 of 2

    Lot 2 Hydroponics pH Test Indicator Kit 1 oz. Wide Spectrum Super-Concentrated

    Brand New · General Hydroponics
    (62)
    $12.99
    $7.60 shipping
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  • Hydroponics ph control kit - Image 1 of 3

    Hydroponics ph control kit

    Brand New · General Hydroponics
    $21.45
    $6.53 shipping
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  • General Hydroponics pH 4.01 Calibration Solution, 1 Qt. -For pH Meter Reference - Image 1 of 3

    General Hydroponics pH 4.01 Calibration Solution, 1 Qt. -For pH Meter Reference

    Brand New · General Hydroponics
    $21.89
    or Best Offer
    Free shipping
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  • (2) General Hydroponics pH Test Indicator Control Kit 1oz -wide spectrum NEW! - Image 1 of 3

    (2) General Hydroponics pH Test Indicator Control Kit 1oz -wide spectrum NEW!

    Brand New · General Hydroponics
    (62)
    $23.99
    Free shipping
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  • General Hydroponics pH Test Indicator 8 oz Ounces - Image 1 of 1

    General Hydroponics pH Test Indicator 8 oz Ounces

    Brand New · General Hydroponics
    (49)
    $24.95
    Free shipping
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  • General Hydroponics pH Test Indicator 8 Ounces - Image 1 of 1

    General Hydroponics pH Test Indicator 8 Ounces

    Brand New · General Hydroponics
    $14.66
    Free shipping
    Only 2 left
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  • General Hydroponics Standard Reference Solution 4.01 and 7.0 Quart Package - Image 1 of 1

    General Hydroponics Standard Reference Solution 4.01 and 7.0 Quart Package

    Brand New · General Hydroponics
    $30.00
    Free shipping
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  • General Hydroponics pH Test Indicator 8oz ph done easy - Image 1 of 1

    General Hydroponics pH Test Indicator 8oz ph done easy

    Brand New · General Hydroponics
    $15.69
    Free shipping
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  • General Hydroponics pH 4.01 Calibration Solution, 1 Qt. - Image 1 of 1

    General Hydroponics pH 4.01 Calibration Solution, 1 Qt.

    Brand New · General Hydroponics
    $18.50
    Free shipping
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  • General Hydroponics GH pH Test Indicator Control Kit 1 fl oz (30mL) Concentrate - Image 1 of 1

    General Hydroponics GH pH Test Indicator Control Kit 1 fl oz (30mL) Concentrate

    Brand New · General Hydroponics
    (62)
    $13.99
    Free shipping
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