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  • GroStar GS1-E replacement pH electrode

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

  • GroStar GS2 Soil PH/Temp (2-IN-1) Pen

    AI31020 - GroStar GS2 Soil PH/TEMP (2-IN-1) PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year warranty Swiss made (probe)• ...

  • GroStar GS2-E replacement Soil Spear pH electrode

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

  • GroStar GS3 EC/500ppm/700ppm/Temp (4-IN-1) Pen

    AI11030 - GroStar GS3 EC/500ppm/700ppm/Temp (4-IN-1) PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year warranty (probe)• 2.77 ...

  • GroStar GS3-E replacement EC electrode

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

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

    AI21040 - GroStar GS4 pH/EC/500ppm/700ppm & Temp (5-in-1) Combo PenLab grade instruments designed specifically for growers!Includes: • 2-year warranty (instrument)• 1-year ...

  • GroStar GS4-E replacement pH/EC combo electrode

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

  • GroStar pH calibration kit (pH 4/7, 8 oz. each)

    GroStar by Apera pH calibration kit (pH 4/7, 8 oz. each) Kit includes:  (1) 8 oz. pH 4.0 calibration solution (1) 8 ...

  • GroStar pH calibration kit (pH 4/7/10, 8 oz. each)

    GroStar by Apera pH calibration kit (pH 4/7/10, 8 oz. each) Kit Includes: (1) pH 4.0 calibration solution 8 oz. (1) pH 7.0 ...

  • GroStar pH Probe Maintanence Kit

    All-in-one maintanence kit provides everything you need to maintain, clean and store your GroStar pH probe Kit Includes:  3M KCL storage solution (4oz.) Cleaning solution ...

  • Grotek Blossom Blaster Pro Liquid, 1 L

    Size: 1 L

  • Grotek Blossom Blaster Pro Liquid, 4 L

    A high phosphorous formula that supports flower growth and key metabolic processes by enhancing the plants own systems. The nutrient ratios ...

  • Grotek Blossom Blaster, 130 g

    Blossom Blaster™ provides available phosphorous to improve root development and aid in blooming and fruiting. Potassium is instrumental in moving ...

  • Grotek Blossom Blaster, 2.5 kg

    Blossom Blaster™ provides available phosphorous to improve root development and aid in blooming and fruiting. Potassium is instrumental ...

  • Grotek Blossom Blaster, 20 g

    Blossom Blaster™ provides available phosphorus to improve root development and aid in blooming and fruiting. Potassium is instrumental in moving ...

  • Grotek Blossom Blaster, 500 g

    Blossom Blaster™ provides available phosphorous to improve root development and aid in blooming and fruiting. Potassium is instrumental in moving ...

  • Grotek Bud Fuel Pro, 1 L

    Size: 1 L

  • Grotek Bud Fuel Pro, 4 L

    A unique transitional product formulated to be used during the pre flowering and early flowering stages to improve overall flower ...

  • Grotek Cal-Max, 1 gal

    During periods of high temperatures and accelerated growth, plants can develop nutrient deficiencies, which are preventable. Cal-Max™ was developed to ...

  • Grotek Cal-Max, 1 qt

    During periods of high temperatures and accelerated growth, plants can develop nutrient deficiencies, which are preventable. Cal-Max™ was developed to ...

  • Grotek Cal-Max, 10 L

    During periods of high temperatures and accelerated growth, plants can develop nutrient deficiencies, which are preventable. Cal-Max™ was developed to ...

  • Grotek Cal-Max, 23 L

    During periods of high temperatures and accelerated growth, plants can develop nutrient deficiencies, which are preventable. Cal-Max™ was developed to ...

  • Grotek Core, 1 L

    At the heart of Grotek's line is the essential NPK that provides the foundation for their multi-product formula. Core™ is ...

  • Grotek Final Flush Blueberry, 1 L

    Final Flush™ is a flushing agent designed to correct overfeeding issues during crop production and also eliminate excess salts from the ...

  • Grotek Final Flush, 1 L

    The Final Flush eliminates excess fertilizer salts in the final stages of growth and can also be used to correct ...

  • Grotek Gro-Silic, 10 L

    GRO-SILIC™Soluble Silicon GRO-SILIC™ SOLUBLE SILICON is a concentrated liquid silicon supplement suitable for soilless and hydroponic systems. This plant-available form of ...

  • Grotek Growth Booster, 300 g

    Formulated to encourage early and vigorous growth, Growth Booster™ is an excellent supplement for growing plants. High nitrogen supports green growth while ...

  • Grotek Growth Max, 1 L

    Kelp has long been known as an amazing organic supplement. GrowthMax™ is a highly concentrated cold processed kelp rich in ...