Showing 105–156 of 246 results

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PH/EC/TDS Meters and Solutions

Emerald Harvest pH Up Emerald Harvest

Original price was: $ 24,70.Current price is: $ 14,82.
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PH/EC/TDS Meters and Solutions

Future Harvest Grow Boss – Nutrient Monitor (4/Cs) Future Harvest

Original price was: $ 309,95.Current price is: $ 92,98.
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PH/EC/TDS Meters and Solutions

General Hydroponics pH Control Kit General Hydroponics

Original price was: $ 20,68.Current price is: $ 12,41.
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PH/EC/TDS Meters and Solutions

General Hydroponics pH Down Liquid General Hydroponics

Original price was: $ 9,63.Current price is: $ 5,78.
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PH/EC/TDS Meters and Solutions

General Hydroponics pH Test Indicator General Hydroponics

Original price was: $ 8,63.Current price is: $ 5,18.
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PH/EC/TDS Meters and Solutions

General Hydroponics pH Up Liquid General Hydroponics

Original price was: $ 9,63.Current price is: $ 5,78.
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PH/EC/TDS Meters and Solutions

General Hydroponics PRO pH General Hydroponics

Original price was: $ 160,07.Current price is: $ 64,03.
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PH/EC/TDS Meters and Solutions

GH 1500 PPM Reference Solution 8 oz (12/Cs) General Hydroponics

Original price was: $ 8,92.Current price is: $ 5,35.
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PH/EC/TDS Meters and Solutions

GH 1500 PPM Reference Solution Quart (12/Cs) General Hydroponics

Original price was: $ 22,69.Current price is: $ 13,61.
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PH/EC/TDS Meters and Solutions

GH pH 4.01 Calibration Solution 8 oz (12/Cs) General Hydroponics

Original price was: $ 8,13.Current price is: $ 4,88.
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PH/EC/TDS Meters and Solutions

GH pH 4.01 Calibration Solution Quart (12/Cs) General Hydroponics

Original price was: $ 23,18.Current price is: $ 13,91.
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PH/EC/TDS Meters and Solutions

GH pH 7.01 Calibration Solution 8 oz (12/Cs) General Hydroponics

Original price was: $ 8,13.Current price is: $ 4,88.
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PH/EC/TDS Meters and Solutions

GH pH 7.01 Calibration Solution Quart (12/Cs) General Hydroponics

Original price was: $ 25,75.Current price is: $ 15,45.
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PH/EC/TDS Meters and Solutions

Gro’chek replacement probe for HI9813-6 Hanna Instruments

Original price was: $ 156,99.Current price is: $ 62,80.
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PH/EC/TDS Meters and Solutions

GroChek Hanna pH/EC/TDS/C/PPT Pocket Tester Hanna Instruments

Original price was: $ 213,99.Current price is: $ 85,60.
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PH/EC/TDS Meters and Solutions

GroChek pH & TDS Combo Continuous Reading Meter Hanna Instruments

Original price was: $ 249,99.Current price is: $ 100,00.
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PH/EC/TDS Meters and Solutions

GroChek pH/EC/TDS/C Portable Meter w/ Cal Check Hanna Instruments

Original price was: $ 292,99.Current price is: $ 117,20.
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PH/EC/TDS Meters and Solutions

GroChek pH/EC/TDS/Temp. Combo Hanna Instruments

Original price was: $ 278,99.Current price is: $ 111,60.
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PH/EC/TDS Meters and Solutions

Grochek Replacement Probe for HI9813-5 & HI9813-5N Hanna Instruments

Original price was: $ 156,99.Current price is: $ 62,80.
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PH/EC/TDS Meters and Solutions

GroStar GS2 Soil pH Pen GroStar

Original price was: $ 256,99.Current price is: $ 102,80.
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PH/EC/TDS Meters and Solutions

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

Original price was: $ 18,99.Current price is: $ 11,39.
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PH/EC/TDS Meters and Solutions

Grow More pH Down 30% Gallon (4/Cs) Grow More

Original price was: $ 22,68.Current price is: $ 13,61.
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PH/EC/TDS Meters and Solutions

Grow More pH Up 30% Gallon (4/Cs) Grow More

Original price was: $ 22,68.Current price is: $ 13,61.
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PH/EC/TDS Meters and Solutions

Grow More pH Up 30% Quart (12/Cs) Grow More

Original price was: $ 8,34.Current price is: $ 5,00.
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PH/EC/TDS Meters and Solutions

HALO Direct Soil Bluetooth pH Electrode Hanna Instruments

Original price was: $ 266,99.Current price is: $ 106,80.
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PH/EC/TDS Meters and Solutions

HALO Gel Filled Bluetooth pH Electrode Hanna Instruments

Original price was: $ 212,99.Current price is: $ 85,20.
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PH/EC/TDS Meters and Solutions

Hanna Gro’CHEK pHEP 4 Meter Hanna Instruments

Original price was: $ 126,99.Current price is: $ 50,80.
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PH/EC/TDS Meters and Solutions

Hanna Gro’CHEK pHEP 5 Meter Hanna Instruments

Original price was: $ 139,99.Current price is: $ 56,00.
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PH/EC/TDS Meters and Solutions

HM Digital Aquapro TDS Water Tester HM Digital

Original price was: $ 42,95.Current price is: $ 25,77.
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PH/EC/TDS Meters and Solutions

HM Digital Handheld TDS-3 Tester HM Digital

Original price was: $ 30,22.Current price is: $ 18,13.
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PH/EC/TDS Meters and Solutions

HM Digital HydroMaster HM-500 HM Digital

Original price was: $ 359,00.Current price is: $ 107,70.
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PH/EC/TDS Meters and Solutions

HM Digital Hydromaster Portable HM Digital

Original price was: $ 274,95.Current price is: $ 109,98.
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PH/EC/TDS Meters and Solutions

HM Digital pH / TDS / EC / Temp meter HM Digital

Original price was: $ 172,94.Current price is: $ 69,18.
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PH/EC/TDS Meters and Solutions

HM Digital pH 80 Meter HM Digital

Original price was: $ 49,29.Current price is: $ 29,57.
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PH/EC/TDS Meters and Solutions

HM Digital Replacement Probe for pH HM Digital

Original price was: $ 46,87.Current price is: $ 28,12.
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PH/EC/TDS Meters and Solutions

HM Digital Water Resistant Ec/TDS Meter w/ Temperature HM Digital

Original price was: $ 46,44.Current price is: $ 27,86.
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PH/EC/TDS Meters and Solutions

HM Digital Waterproof pH Meter HM Digital

Original price was: $ 108,07.Current price is: $ 43,23.
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PH/EC/TDS Meters and Solutions

HM Waterproof EC/TDS/Temp Combo Meter HM Digital

Original price was: $ 76,95.Current price is: $ 38,48.
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PH/EC/TDS Meters and Solutions

Low/High/EC High Replacement Sensor Oakton

Original price was: $ 86,99.Current price is: $ 43,49.
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PH/EC/TDS Meters and Solutions

Luster Leaf Rapitest 4 Way Analyzer (3/Cs) Luster Leaf

Original price was: $ 39,99.Current price is: $ 23,99.
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PH/EC/TDS Meters and Solutions

Luster Leaf® Rapitest® Soil 4-in-1 Tester – Test 4 Variables Luster Leaf

Original price was: $ 19,99.Current price is: $ 11,99.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down 1 Gallon Mad Farmer

Original price was: $ 31,49.Current price is: $ 18,89.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down 2.5 Gallon (2/Cs) Mad Farmer

Original price was: $ 146,99.Current price is: $ 58,80.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down 275 Gallon (1/Cs) Mad Farmer

Original price was: $ 4.725,00.Current price is: $ 1.181,25.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down 30 Gallon (1/Cs) Mad Farmer

Original price was: $ 577,50.Current price is: $ 173,25.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down 55 Gallon (1/Cs) Mad Farmer

Original price was: $ 971,25.Current price is: $ 242,81.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down 6 Gallon (1/Cs) Mad Farmer

Original price was: $ 167,99.Current price is: $ 67,20.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Down Quart (12/Cs) Mad Farmer

Original price was: $ 11,57.Current price is: $ 6,94.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Up 1 Gallon (4/Cs) Mad Farmer

Original price was: $ 31,49.Current price is: $ 18,89.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Up 2.5 Gallon (2/Cs) Mad Farmer

Original price was: $ 146,99.Current price is: $ 58,80.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Up 275 Gallon (1/Cs) Mad Farmer

Original price was: $ 4.725,00.Current price is: $ 1.181,25.
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PH/EC/TDS Meters and Solutions

Mad Farmer Get Up 30 Gallon (1/Cs) Mad Farmer

Original price was: $ 577,50.Current price is: $ 173,25.