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Summer Sale on Grower's Choice, HLG, Mammoth, Mars Hydro, and more! SHOP SALE
Summer Sale on Grower's Choice, HLG, Mammoth, Mars Hydro, and more! SHOP SALE

GroLine by Hanna Instruments

  • Original price $130.00 - Original price $130.00
    Original price
    $130.00
    $130.00 - $130.00
    Current price $130.00

    GroLine Soil pH Tester

    In stock

    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 $85.00 - Original price $85.00
    Original price
    $85.00
    $85.00 - $85.00
    Current price $85.00

    GroLine Waterproof EC/TDS (ppm) Tester

    In stock

    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 $129.00 - Original price $129.00
    Original price
    $129.00
    $129.00 - $129.00
    Current price $129.00

    GroLine Soil Test™ Direct Soil Conductivity Tester

    In stock

    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 $60.00 - Original price $60.00
    Original price
    $60.00
    $60.00 - $60.00
    Current price $60.00

    GroLine Hydroponics pH Tester

    In stock

    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 $85.00 - Original price $85.00
    Original price
    $85.00
    $85.00 - $85.00
    Current price $85.00

    GroLine Waterproof Hydroponic pH Tester

    In stock

    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 $225.00 - Original price $225.00
    Original price
    $225.00
    $225.00 - $225.00
    Current price $225.00

    GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

    In stock

    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 $279.00 - Original price $279.00
    Original price
    $279.00
    $279.00 - $279.00
    Current price $279.00

    GroLine Waterproof Portable pH/EC/TDS Meter

    In stock

    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 $395.00 - Original price $685.00
    Original price
    $395.00
    $395.00 - $685.00
    Current price $395.00

    GroLine Nutrient Dosing System

    In stock

    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 $395.00 - Original price $685.00
    Original price
    $395.00
    $395.00 - $685.00
    Current price $395.00

    GroLine pH Dosing System

    In stock

    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 $505.00 - Original price $505.00
    Original price
    $505.00
    $505.00 - $505.00
    Current price $505.00

    GroLine Monitor for Hydroponic Nutrients with Inline Probe

    In stock

    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 $389.00 - Original price $389.00
    Original price
    $389.00
    $389.00 - $389.00
    Current price $389.00

    GroLine Monitor for Hydroponic Nutrients

    In stock

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

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