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  • GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen

    $215.00 - $215.00
    $215.00
    $215.00 - $215.00
    $215.00

    AI21040 - GroStar GS4 pH/EC/500ppm/700ppm & Temp (5-in-1) Combo Pen Lab grade instruments designed specifically for growers! Includes:  pH 7...

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    $215.00 - $215.00
    $215.00
    $215.00 - $215.00
    $215.00
  • Save $5.00 Save $0.00

    Mini Greenhouse Thermo-Hygrometer

    $20.00
    $20.00 - $20.00
    $20.00
    $15.00
    $15.00 - $15.00
    $15.00

    The Mondi Mini Greenhouse Thermo-Hygrometer mounts to the side of your mini greenhouse and reads temperature and humidity inside the dome. It ensur...

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    $20.00
    $20.00 - $20.00
    $20.00
    $15.00
    $15.00 - $15.00
    $15.00
    Save $5.00 Save $0.00

  • HM Digital PH-80 pH/Temperature Meter

    $46.50 - $46.50
    $46.50
    $46.50 - $46.50
    $46.50

    The PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, pools & spas...

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    $46.50 - $46.50
    $46.50
    $46.50 - $46.50
    $46.50
  • Save $15.00 Save $0.00

    Gardena Smart Flow Water Meter

    $60.00
    $60.00 - $60.00
    $60.00
    $45.00
    $45.00 - $45.00
    $45.00

    The Gardena Smart Flow Water Meter measures water usage daily, monthly, by season, or yearly. The LCD screen clearly displays information with meas...

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    $60.00
    $60.00 - $60.00
    $60.00
    $45.00
    $45.00 - $45.00
    $45.00
    Save $15.00 Save $0.00

  • HM Digital COM-100 Waterproof EC/TDS/Temp Combo Meter

    $75.99 - $75.99
    $75.99
    $75.99 - $75.99
    $75.99

    Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal sil...

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    $75.99 - $75.99
    $75.99
    $75.99 - $75.99
    $75.99

  • GroStar GS3-E replacement EC electrode

    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

    AI58030 - GroStar GS3-E replacement EC electrode • Measures conductivity EC, PPM (500), PPM (700) and temperature• Premium probe technologies and ...

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    $65.00 - $65.00
    $65.00
    $65.00 - $65.00
    $65.00

  • GroStar GS1-E replacement pH electrode

    $60.00 - $60.00
    $60.00
    $60.00 - $60.00
    $60.00

    AI58010 - GroStar GS1-E replacement pH electrode • Replacement GS1 probe measures pH and temperature• Premium probe technologies and materials ens...

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    $60.00 - $60.00
    $60.00
    $60.00 - $60.00
    $60.00

  • GroStar GS3 EC Pen

    $139.00 - $139.00
    $139.00
    $139.00 - $139.00
    $139.00

    Lab grade instruments designed specifically for growers! Includes: 2.77 EC calibration solution (50 ml bottle) • Measures conductivity EC, PPM (500...

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    $139.00 - $139.00
    $139.00
    $139.00 - $139.00
    $139.00

  • GroStar GS1 pH Pen

    $139.00 - $139.00
    $139.00
    $139.00 - $139.00
    $139.00

    Lab grade instruments designed specifically for growers! Includes: pH 7 & pH4 calibration solution (50ml bottle each), KCL storage solution (10...

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    $139.00 - $139.00
    $139.00
    $139.00 - $139.00
    $139.00
  • Save $8.00 Save $0.00

    Luster Leaf Digital Soil pH Meter

    $24.00
    $24.00 - $24.00
    $24.00
    $16.00
    $16.00 - $16.00
    $16.00

    Digital results from 3.5 to 9.0. Instructions and plant pH preference list included.

    $24.00
    $24.00 - $24.00
    $24.00
    $16.00
    $16.00 - $16.00
    $16.00
    Save $8.00 Save $0.00
  • Save $6.00 Save $0.00

    Luster Leaf Digital Moisture Meter

    $21.00
    $21.00 - $21.00
    $21.00
    $15.00
    $15.00 - $15.00
    $15.00

    Digital results from 0 to 9.9. Printed instructions and extensive plant list.

    $21.00
    $21.00 - $21.00
    $21.00
    $15.00
    $15.00 - $15.00
    $15.00
    Save $6.00 Save $0.00
  • Save $7.00 Save $0.00

    P3 International Save a Drop Water Meter

    $24.00
    $24.00 - $24.00
    $24.00
    $17.00
    $17.00 - $17.00
    $17.00

    It is widely accepted that talking to your plants is great for their health. If they could speak to you, what would they say? Probably that they're...

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    $24.00
    $24.00 - $24.00
    $24.00
    $17.00
    $17.00 - $17.00
    $17.00
    Save $7.00 Save $0.00

  • HM Digital Replacement Platinum Sensor for COM-100

    $35.00 - $35.00
    $35.00
    $35.00 - $35.00
    $35.00

    This spare sensor is for HM Digital EC/TDS/Temp Combo Meter model COM-100. Features platinum TDS/EC sensor and thermister.

    $35.00 - $35.00
    $35.00
    $35.00 - $35.00
    $35.00

  • GroStar GS4-E replacement pH/EC combo electrode

    $96.00 - $96.00
    $96.00
    $96.00 - $96.00
    $96.00

    AI58040 - GroStar GS4-E replacement pH/EC combo electrode • Measures pH, conductivity (EC and PPM) and temperature• Combo probe built with lithium...

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    $96.00 - $96.00
    $96.00
    $96.00 - $96.00
    $96.00

  • GroStar GS2-E replacement Soil Spear pH electrode

    $220.00 - $220.00
    $220.00
    $220.00 - $220.00
    $220.00

    AI58020 - GroStar GS2-E replacement Soil Spear pH electrode • Spear pH Probe measures pH and temperature in nutrient solution, soil, coco coir, ro...

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    $220.00 - $220.00
    $220.00
    $220.00 - $220.00
    $220.00

  • GroStar GS2 Soil pH Pen

    $310.00 - $310.00
    $310.00
    $310.00 - $310.00
    $310.00

    AI31020 - GroStar GS2 Soil pH Pen Lab grade instruments designed specifically for growers! Includes: pH 7 &  pH 4 solution (50ml bottles of e...

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    $310.00 - $310.00
    $310.00
    $310.00 - $310.00
    $310.00