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July Sale! Discounts on LED grow lights and more! | VIEW DEALS
July Sale! Discounts on LED grow lights and more! | VIEW DEALS

GroLine by Hanna Instruments

Grow better with GroLine.

Meters and testers designed for hydroponic, aquaponic, and greenhouse growers to get consistently great results. Hanna GroLine products are the most accurate and easiest to use tools to help you manage your growing nutrients.

  • Original price $143.00 - Original price $143.00
    Original price
    $143.00
    $143.00 - $143.00
    Current price $143.00

    GroLine Soil pH Tester (HI981030)

    HI981030 Soil pH Tester Designed to bring simplicity to pH testing of soil, the HI981030 GroLine Soil pH Tester is designed for taking dire...

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    Original price $143.00 - Original price $143.00
    Original price
    $143.00
    $143.00 - $143.00
    Current price $143.00
  • Original price $142.00 - Original price $142.00
    Original price
    $142.00
    $142.00 - $142.00
    Current price $142.00

    GroLine Soil Test™ Direct Soil Conductivity Tester (HI98331)

    HI98331 Direct Soil Conductivity Tester The HI98331 Soil Test™ is a pocket tester specifically designed to directly measure soil conductivit...

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    Original price $142.00 - Original price $142.00
    Original price
    $142.00
    $142.00 - $142.00
    Current price $142.00
  • Original price $104.00 - Original price $104.00
    Original price
    $104.00
    $104.00 - $104.00
    Current price $104.00

    GroLine Waterproof Hydroponic pH Tester (HI98118)

    HI98118 Waterproof Hydroponic pH Tester The GroLine HI98118 pH/temperature tester is our latest pocket meter for measuring the pH of a hydro...

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    Original price $104.00 - Original price $104.00
    Original price
    $104.00
    $104.00 - $104.00
    Current price $104.00
  • Original price $66.00 - Original price $66.00
    Original price
    $66.00
    $66.00 - $66.00
    Current price $66.00

    GroLine Hydroponics pH Tester (HI98115)

    HI98115 GroLine Hydroponics pH Tester The HI98115 is a GroLine pH tester with advanced features for the measurement of pH in hydroponic nut...

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    Original price $66.00 - Original price $66.00
    Original price
    $66.00
    $66.00 - $66.00
    Current price $66.00
  • Original price $307.00 - Original price $307.00
    Original price
    $307.00
    $307.00 - $307.00
    Current price $307.00

    GroLine Waterproof Portable pH/EC/TDS Meter (HI9814)

    HI9814 Waterproof Portable pH/EC/TDS Meter Designed to bring simplicity to nutrient testing, the HI9814 Portable GroLine Meter is designed specifi...

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    Original price $307.00 - Original price $307.00
    Original price
    $307.00
    $307.00 - $307.00
    Current price $307.00
  • Original price $446.00 - Original price $736.00
    Original price
    $446.00
    $446.00 - $736.00
    Current price $446.00

    GroLine pH Dosing System (HI981412)

    HI981412 pH Dosing System Maintaining the correct pH of plant soil or hydroponic nutrient solution is an ongoing task. Macro and micro nutrients, ...

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    Original price $446.00 - Original price $736.00
    Original price
    $446.00
    $446.00 - $736.00
    Current price $446.00
  • Original price $104.00 - Original price $104.00
    Original price
    $104.00
    $104.00 - $104.00
    Current price $104.00

    GroLine Waterproof EC/TDS (ppm) Tester (HI98318)

    HI98318 Waterproof EC/TDS (ppm) Tester The HI98318 is our latest pocket meter for measuring the EC/TDS of a hydroponic nutrient solution. Th...

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    Original price $104.00 - Original price $104.00
    Original price
    $104.00
    $104.00 - $104.00
    Current price $104.00
  • Original price $248.00 - Original price $248.00
    Original price
    $248.00
    $248.00 - $248.00
    Current price $248.00

    GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester (HI98131)

    HI98131 Waterproof Pocket pH/EC/TDS/Temperature Tester The HI98131 is a slim, lightweight, and waterproof pocket tester that measures pH, conducti...

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    Original price $248.00 - Original price $248.00
    Original price
    $248.00
    $248.00 - $248.00
    Current price $248.00
  • Original price $556.00 - Original price $556.00
    Original price
    $556.00
    $556.00 - $556.00
    Current price $556.00

    GroLine Monitor for Hydroponic Nutrients with Inline Probe (HI981421)

    HI981421 Monitor for Hydroponic Nutrients with Inline Prober The HI981421 GroLine Monitor for Hydroponic Nutrients provides around-the-clock, con...

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    Original price $556.00 - Original price $556.00
    Original price
    $556.00
    $556.00 - $556.00
    Current price $556.00
  • Original price $451.00 - Original price $741.00
    Original price
    $451.00
    $451.00 - $741.00
    Current price $451.00

    GroLine Nutrient Dosing System (HI981413)

    HI981413 Nutrient Dosing System The HI981413 Nutrient Dosing System is engineered for maintaining the concentration of fertilizer in the nutrient ...

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    Original price $451.00 - Original price $741.00
    Original price
    $451.00
    $451.00 - $741.00
    Current price $451.00
  • Original price $435.00 - Original price $435.00
    Original price
    $435.00
    $435.00 - $435.00
    Current price $435.00

    GroLine Monitor for Hydroponic Nutrients (HI981420)

    HI981420 Hydroponics Monitor The HI981420 GroLine Monitor for Hydroponic Nutrients provides around-the-clock, continuous monitoring of pH, conduc...

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    Original price $435.00 - Original price $435.00
    Original price
    $435.00
    $435.00 - $435.00
    Current price $435.00

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