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Pens

  • Out of Stock

    Rapitest Mini pH Tester

    $6.30 - $6.30
    $6.30
    $6.30 - $6.30
    $6.30

    $6.30 - $6.30
    $6.30
    $6.30 - $6.30
    $6.30
    Out of Stock
  • Out of Stock

    Rapitest Soil Test pH N,P,K (6-Cs)

    $22.79 - $22.79
    $22.79
    $22.79 - $22.79
    $22.79

    Rapitest Soil Test Kit uses a patented color comparator test system. Performs forty (40) tests, ten (10) each for soil pH, Nitrogen, Phosphorus and...

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    $22.79 - $22.79
    $22.79
    $22.79 - $22.79
    $22.79
    Out of Stock
  • Out of Stock

    Rapitest pH Soil Tester (12-Cs)

    $4.49 - $4.49
    $4.49
    $8.79
    $8.79 - $8.79
    $8.79

    Rapitest Soil pH Test Kit uses a patented color comparator test system. Performs ten (10) tests for soil pH. Test results allow the gardener to ame...

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    $4.49 - $4.49
    $4.49
    $8.79
    $8.79 - $8.79
    $8.79
    Out of Stock
  • Out of Stock

    Luster Leaf Rapitest 4 Way Analyzer (3-Cs)

    $39.79 - $39.79
    $39.79
    $39.79 - $39.79
    $39.79

    Rapitest 4-Way Analyzer incorporates a three (3) probe design. The unit determines soil pH (acidity/alkalinity), fertility (combined N-P-K levels),...

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    $39.79 - $39.79
    $39.79
    $39.79 - $39.79
    $39.79
    Out of Stock

Pens and Green Houses Benefits

Pen like pH or TDS testers are easy to use and calibrate. They are sensitive to small changes and can be carried in pocket easily to any place. EC hydroponics is good way to ensure good growth in plants, you can also compare using EC vs PPM to check what works better for your hydroponic garden. Pick from our selection of high quality, water proof pens from brands such as HM Digital and Oakton. Zenhydro offers discount pens online, waterproof hydroponic pens, EC pen, advanced nutrients PPM scale, hydroponic EC and many more. Check out today.