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Hanna - Alkalinity Checker for drinking water
Sale price$74.99

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Hanna - Total Chlorine Checker Ultra Low Range (0 to 500 ppb)
Sale price$74.99

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Hanna - Phosphate HR Checker HC, 0.0 to 30.0 ppm (mg/L)
Sale price$74.99

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Bluelab - Connect Stick 2
Sale price$137.60

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Bluelab - Connect Range Extender
Sale price$142.20

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Hm Digital - Meter, TDS, Inline, Dm-1, 1/4" Tee
Sale price$85.68

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Hm Digital - Push-In, 1/4" Monitor, TDS, CHECk Quick, Qc-1
Sale price$65.70

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Hm Digital - Meter, TDS, Inline, Dm-2, 1/4" Qc
Sale price$155.50

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Hm Digital - Meter, TDS, Inline, Dm-2, 3/8" Qc
Sale price$198.60

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Hm Digital - Meter, TDS, Inline, Dm-2, 1/2"QC
Sale price$185.50

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Future Harvest - Citric pH Down
Sale priceFrom $10.80

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HGV - pH Down
Sale priceFrom $28.00

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HGV - pH Up
Sale priceFrom $28.00

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SONIC-PRO - Chemical Feed Flow Meter
Sale price$2,225.66

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General Hydroponics - 32oz pH Up Liquid (12/CS)
Sale price$16.78

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General Hydroponics - 32oz pH Down Liquid (12/CS)
Sale price$16.78

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OEM pH Up - Potassium Hydroxide 45% - West Coast Warehouses
Sale priceFrom $112.00

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AC Infinity - PH METERS AND KITS
Sale priceFrom $29.99

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Drip Hydro - pH Down
Sale priceFrom $25.00

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Drip Hydro - pH Up
Sale priceFrom $25.00

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Growlink - Batch Tank Monitor (BTM)
Sale price$699.00

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Bluelab - Truncheon Meter
Sale price$105.00

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Bluelab - Leap pH Probe
Sale price$145.00

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GroStar - Apera GroStar GS4-E replacement pH/EC combo electrode
Sale price$79.99

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GroStar - Apera GroStar GS3-E replacement EC electrode
Sale price$53.99

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GroStar - Apera GroStar GS2-E replacement Soil Spear pH electrode
Sale price$181.99

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GroStar - Apera GroStar GS1-E replacement pH electrode
Sale price$50.99

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HM Digital - Replacement TDS Sensor HM-500 - Hydromaster EC/ Probe
Sale price$57.99

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Microbe Life Hydroponics - pH UP - 1 qt
Sale price$17.99

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Microbe Life Hydroponics - pH Down - 1 qt
Sale price$17.99

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Mad Farmer - Get Up
Sale priceFrom $125.99

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Mad Farmer - Get Down
Sale priceFrom $125.99

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Nectar For The Gods - Hades Down
Sale priceFrom $21.50

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Cutting Edge Solutions - pH Up
Sale priceFrom $79.99

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Cutting Edge Solutions - pH Down
Sale priceFrom $79.99

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Humboldt Nutrients - Big Up Powder - 10 lbs
Sale price$500.99

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Hanna - Instruments pH 4 Buffer 1 Gallon
Sale price$67.99

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Hanna - Instruments pH 7 Buffer 1 Gallon
Sale price$67.99

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Hanna - Reagents for Freshwater Alkalinity Checker
Sale price$32.99

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Hanna - Freshwater Alkalinity Checker HC Calibration Check Set
Sale price$32.99

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Hanna - Phosphate HR Checker HC reagents for 40 tests (Phosphate HR)
Sale price$17.99

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Hanna - GroLine pH 10.01 Calibration Buffer (500 mL)
Sale price$24.99

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Hanna - GroLine pH 10.01 Calibration Buffer (230 mL)
Sale price$19.99