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    1413 US Solution - 500 mL 1500ppm Packet 2-Way pH & Moisture Meter
    1413 US Solution - 500 mL1500PPM Packet2-Way pH & Moisture Meter

    $12.97

    $0.78

    $5.20

    Active Air - 3-Way Meter Active Aqua - Dual Inline TDS Meter APCEPH1 PH Replacement Probe
    Active Air - 3-Way MeterActive Aqua - Dual Inline TDS MeterAPCEPH1 PH Replacement Probe

    $7.46

    $37.46

    $48.71

    AquaPro - TDS/Temp Meter Batteries - pH/TDS pen - 1.4v - 4pck Bluelab - 2.77 EC Conductivity Solution - 250mL
    AquaPro - TDS/Temp MeterBatteries - pH/TDS pen - 1.4v - 4pckBluelab - 2.77 EC Conductivity Solution - 250mL

    $32.21

    $5.21

    $6.37

    Bluelab - 2.77 EC Conductivity Solution - 500 mL Bluelab - Calibration Solution - 2.77pH Bluelab - Combo Meter
    Bluelab - 2.77 EC Conductivity Solution - 500 mLBluelab - Calibration Solution - 2.77pHBluelab - Combo Meter

    $8.24

    $1.41

    $231.00

    Bluelab - Commercial Truncheon Meter Bluelab - Connect Stick Bluelab - Grower's Toolbox-Limited Edition
    Bluelab - Commercial Truncheon MeterBluelab - Connect StickBluelab - Grower's Toolbox-Limited Edition

    $105.00

    $113.77

    $149.25

    Bluelab - Guardian Monitor Bluelab - Guardian Monitor Connect Bluelab - Guardian Monitor Power Supply
    Bluelab - Guardian MonitorBluelab - Guardian Monitor ConnectBluelab - Guardian Monitor Power Supply

    $325.01

    $373.50

    $16.95

    Bluelab - Meter Carry Case Bluelab - pH meter w/probe Bluelab - pH Pen
    Bluelab - Meter Carry CaseBluelab - pH meter w/probeBluelab - pH Pen

    $18.75

    $157.50

    $112.50

    Bluelab - PH Probe KCI Storage Solution Bluelab - Probe Care Kit Conductivity Bluelab - Soil PH Pen
    Bluelab - PH Probe KCI Storage SolutionBluelab - Probe Care Kit ConductivityBluelab - Soil PH Pen

    $8.96

    $8.96

    $133.10

    Botanicare - pH Down - 1gal - 4pck Botanicare - pH Down - 1qt Botanicare - pH Up - 1gal - 4pck
    Botanicare - pH Down - 1gal - 4pckBotanicare - pH Down - 1qtBotanicare - pH Up - 1gal - 4pck

    $87.96

    $11.95

    $91.96

    Botanicare - pH Up - 1qt Cal Check Solution Calibration Solultion - 27.7CF/EC2.77 - 250mL
    Botanicare - pH Up - 1qtCal Check SolutionCalibration Solultion - 27.7CF/EC2.77 - 250mL

    $8.96

    $1.35

    $7.45

    Calibration Solution - 1000ppm Calibration Solution - 1382ppm@25c
    Calibration Solution - 1000ppmCalibration Solution - 12880mS/cm - 20mLCalibration Solution - 1382ppm@25c

    $6.09

    $1.04

    $1.05

    Calibration Solution - 1413mS/cm 25x Calibration Solution 1500ppm Calibration Solution - 1500ppm - 1qt
    Calibration Solution - 1413mS/cm 25x Calibration Solution - 1500ppmCalibration Solution - 1500ppm - 1qt

    $1.08

    $0.96

    $15.50

    Calibration Solution - 1500ppm - 8oz Calibration Solution - 4.0 pH - 20mL Calibration Solution - 7.0 pH - 20mL
    Calibration Solution - 1500ppm - 8ozCalibration Solution - 4.0 pH - 20mLCalibration Solution - 7.0 pH - 20mL

    $6.45

    $1.35

    $1.35

    Calibration Solution - pH 4.0 - 250 mL - 6pck Calibration Solution - pH 4.0 - 500mL - 6pck Calibration Solution - pH 4.01 - 1qt
    Calibration Solution - pH 4.0 - 250 mL - 6pckCalibration Solution - pH 4.0 - 500mL - 6pckCalibration Solution - pH 4.01 - 1qt

    $39.16

    $52.76

    $17.54

    Calibration Solution - pH 4.01 - 8oz Calibration Solution - pH 7.0 - 1qt Calibration Solution pH 7.0 - 250 mL - 6pck
    Calibration Solution - pH 4.01 - 8ozCalibration Solution - pH 7.0 - 1qtCalibration Solution - pH 7.0 - 250 mL - 6pck

    $6.36

    $17.21

    $44.96

    Calibration Solution - pH 7.0 - 8oz Calibration Solution - pH 7.01 - 25x20 - 25pck Checker pH Tester w/Replaceable Electrode
    Calibration Solution - pH 7.0 - 8ozCalibration Solution - pH 7.01 - 25x20 - 25pckChecker pH Tester w/Replaceable Electrode

    $7.45

    $29.96

    $32.76

    Combo pH/ORP/Temp Tester Conductivity Solution - 12880 S/cm Conductivity/TDS Probe for Soil Measurement of HI993310
    Combo pH/ORP/Temp TesterConductivity Solution - 12880 S/cm Conductivity/TDS Probe for Soil Measurement of HI993310

    $140.96

    $11.24

    $117.71

    CYCO pH Down, 250 mL CYCO pH Down, 500 mL CYCO pH Down, 5 L
    CYCO pH Down 250mLCYCO pH Down 500mLCYCO pH Down 5L

    $5.37

    $6.44

    $23.60

    CYCO pH Up, 250 mL CYCO pH Up, 500 mL CYCO pH Up, 5 L
    CYCO pH Up 250mLCYCO pH Up 500mLCYCO pH Up 5L

    $5.37

    $6.44

    $23.60

    CYCO pH Up, L Digital Pen Batteries 4/pck Digital Soil Thermometer
    CYCO pH Up, LDigital Pen Batteries 4/pckDigital Soil Thermometer

    $9.30

    $3.25

    $11.56

    Digital Temperature Controller for Heat Mat Earth Juice - Double Down - 1gal Earth Juice - Double Down - 1qt
    Digital Temperature Controller for Heat MatEarth Juice - Double Down - 1galEarth Juice - Double Down - 1qt

    $37.75

    $19.39

    $9.23

    Earth Juice - Double Up - 1gal Earth Juice - Double Up - 1qt Earth Juice - Natural Up - 10lbs
    Earth Juice - Double Up - 1galEarth Juice - Double Up - 1qtEarth Juice - Natural Up - 10lbs

    $20.69

    $9.23

    $70.10

    Earth Juice - Natural Up - 1lb Earth Juice - Natural Up - 2lbs Earth Juice - Natural Up - 30lbs
    Earth Juice - Natural Up - 1lbEarth Juice - Natural Up - 2lbsEarth Juice - Natural Up - 30lbs

    $8.78

    $18.41

    $202.19

    EC Solution 1413 EC/TDS/Temp Waterproof Hydro Tester EC65 Waterproof Tester
    EC Solution 1413EC/TDS/Temp Waterproof Hydro TesterEC65 Waterproof Tester

    $1.00

    $47.95

    $80.95

    EC66 Waterproof Tester Eco Tester TDS High Eco Tester TDS Low
    EC66 Waterproof TesterEco Tester TDS HighEco Tester TDS Low

    $80.95

    $84.95

    $84.95

    Electrode Cleaner - 16oz Electrolyte Solution Essentials - Calibration 7.0 - 1qt
    Electrode Cleaner - 16ozElectrolyte SolutionEssentials - Calibration 7.0 - 1qt

    $15.96

    $45.71

    $15.57

    Essentials - Calibration 8oz 7.0 Essentials - Calibration Solution 4.01 - 1qt Essentials - Calibration Solution 4.01 - 8oz
    Essentials - Calibration 8oz 7.0Essentials - Calibration Solution 4.01 - 1qtEssentials - Calibration Solution 4.01 - 8oz

    $6.20

    $15.57

    $6.20

    Essentials - pH Down - 1gal Essentials - pH Down - 1qt Essentials - pH Up - 1gal
    Essentials - pH Down - 1galEssentials - pH Down - 1qtEssentials - pH Up - 1gal

    $19.99

    $8.25

    $20.60

    Essentials - pH Up - 1pt Essentials - pH Up - 1qt GreenGro - Hydroponic H2O Conditioner
    Essentials - pH Up - 1ptEssentials - pH Up - 1qtGreenGro - Hydroponic H2O Conditioner

    $5.85

    $8.44

    $17.21

    Gro'chek - Replacement Probe for HI9813-6 Gro1 - Digital Weather Station GroChek EC Electrode
    Gro'chek - Replacement Probe for HI9813-6Gro1 - Digital Weather StationGroChek EC Electrode

    $138.95

    $19.99

    $45.00

    GroChek EC Tester GroChek pH & TDS Combo Continuous Reading Meter GroChek pH Indicator
    GroChek EC TesterGroChek pH & TDS Combo Continuous Reading MeterGroChek pH Indicator

    $90.50

    $164.55

    $93.56

    GroChek pH/EC/TDS/C Portable Meter w/ Cal Check GroChek pH/EC/TDS/C Portable Meter w/ Cal Check GroChek pH/EC/TDS/Temp. Combo
    GroChek pH/EC/TDS/C Portable Meter w/ Cal CheckGroChek pH/EC/TDS/C Portable Meter w/ Cal CheckGroChek pH/EC/TDS/Temp. Combo

    $221.00

    $283.95

    $192.62

    GroChek replacement probe for HI9813 GroChek replacement probe for HI9813-0 Grochek Replacement Probe for HI9813-5 & HI9813-5N
    GroChek replacement probe for HI9813GroChek replacement probe for HI9813-0Grochek Replacement Probe for HI9813-5 & HI9813-5N

    $108.38

    $120.84

    $122.43

    Hanna PH Kit for Hydroponics Kick Start - Clone Solution - 1qt Lacrosse - Wireless Weather Station
    Hanna PH Kit for HydroponicsKick Start - Clone Solution - 1qtLacrosse - Wireless Weather Station

    $36.70

    $11.20

    $39.99

    Life Cloning Solution - 1gal Life Cloning Solution - 2.5gal Life Cloning Solution - 32oz
    Life Cloning Solution - 1galLife Cloning Solution - 2.5galLife Cloning Solution - 32oz

    $69.95

    $139.95

    $22.95

    MA 850 Replacement probe for SM801/802 Microbe Life - pH Down - 16oz Microbe Life - pH Down - 1gal
    MA 850 Replacement probe for SM801/802Microbe Life - pH Down - 16ozMicrobe Life - pH Down - 1gal

    $119.95

    $19.95

    $47.96

    Microbe Life - pH Down - 32oz Microbe Life - pH Up - 16oz Microbe Life - pH Up - 1gal
    Microbe Life - pH Down - 32ozMicrobe Life - pH Up - 16ozMicrobe Life - pH Up - 1gal

    $23.96

    $19.95

    $47.96

    Microbe Life - pH Up - 2.5gal Microbe Life - pH Up - 32oz Mini pH Controller
    Microbe Life - pH Up - 2.5galMicrobe Life - pH Up - 32ozMini pH Controller

    $67.46

    $23.96

    $149.76

    Nutradip - Grow Boss Nutradip - PH AC/DC Combo Meter Nutradip - PPM AC/DC Combo Meter
    Nutradip - Grow BossNutradip - PH AC/DC Combo MeterNutradip - PPM AC/DC Combo Meter

    $215.96

    $93.71

    $93.71

    Oakton - Waterproof EcoTster pH2 Oakton - Calibration Solution - 15,000 uS Oakton - Low/High/EC High Replacement Sensor
    Oakton - Waterproof EcoTster pH2Oakton - Calibration Solution - 15,000 uSOakton - Low/High/EC High Replacement Sensor

    $100.00

    $1.72

    $53.21

    Oakton - pHTestr 10 - .1 pH Accuracy ATC* Oakton pHTestr 20 - .01 pH Accuracy *ATC Oakton - pHTestrs replacement sensor
    Oakton - pHTestr 10 - .1 pH Accuracy ATC*Oakton - pHTestr 20 - .01 pH Accuracy *ATCOakton - pHTestrs replacement sensor

    $123.71

    $120.76

    $89.96

    Oakton - Replaceable Electrodes pH WP 2 Pen Oakton - Waterproof TDS Tester 11 Oakton - Waterproof TDS Tester11+
    Oakton - Replaceable Electrodes pH WP 2 PenOakton - Waterproof TDS Tester 11Oakton - Waterproof TDS Tester11+

    $63.16

    $111.96

    $119.96

    Oakton - WP EC Tester 11 ORP Test Solution 240 mV @20°C pH 7.0 Calibration Sol 500 ml
    Oakton - WP EC Tester 11ORP Test Solution 240 mV @20°CpH 7.0 Calibration Sol 500 ml - case of 6

    $104.96

    $23.97

    $51.99

    pH Combination Electrode pH Combo Electrode Glass Body pH Control Kit
    pH Combination ElectrodepH Combo Electrode Glass BodypH Control Kit

    $63.96

    $154.36

    $15.96

    pH Controller 115V PH Controller Sampling Kit pH Down Acid - 1gal
    pH Controller 115VPH Controller Sampling KitpH Down Acid - 1gal

    $156.76

    $74.95

    $20.16

    pH Down Acid - 8oz - 12pck pH Down Acid Dry - 16lbs pH Down Acid Quart
    pH Down Acid - 8oz - 12pckpH Down Acid Dry - 16lbspH Down Acid Quart - case of 12

    $75.96

    $51.60

    $103.96

    pH Down Dry Acid - 2.2lbs pH Electrode Probe w/ 2m (6.6') Cable for HI981404N pH Monitor / Hi-Lo User Select Alarm
    pH Down Dry Acid - 2.2lbspH Electrode Probe w/ 2m (6.6') Cable for HI981404NpH Monitor / Hi-Lo User Select Alarm

    $14.99

    $65.95

    $113.56

    ph Replacement Electrode pH Replacement Electrode for Combo & pH Meter pH Soil Meter
    ph Replacement ElectrodepH Replacement Electrode for Combo & pH MeterpH Soil Meter

    $29.96

    $70.00

    $363.96

    pH Test Indicator - 8oz pH Test Kit (12/cs) pH Test Kit - 1oz
    pH Test Indicator - 8ozpH Test Kit (12/cs)pH Test Kit - 1oz

    $9.70

    $4.64

    $7.45

    PH Tester for Hydroponics PH Tester w/1 Point Manual Cal pH Tester With 1 Point Manual Calibration
    PH Tester for HydroponicsPH Tester w/1 Point Manual CalpH Tester With 1 Point Manual Calibration

    $62.95

    $29.96

    $33.71

    pH Up - 1gal pH Up Base - 1qt pH Up Base - 8oz - 12pck
    pH Up - 1galpH Up Base - 1qtpH Up Base - 8oz - 12pck

    $20.16

    $8.07

    $75.96

    pH Up Base Dry - 16lbs pH Up Base Dry - 2.2lbs pH/EC Controller System
    pH Up Base Dry - 16lbspH Up Base Dry - 2.2lbspH/EC Controller System

    $84.80

    $11.25

    $2,396.00

    PH/EC/TDS/C Portable Meters PH/ORP Storage Solution PH/Temp Probe for pH55 & pH56
    PH/EC/TDS/C Portable MetersPH/ORP Storage SolutionPH/Temp Probe for pH55 & pH56

    $195.96

    $9.95

    $44.96

    PH/Temperature Meter PH4 Calibration Solution - 16oz PH4 Solution - 20mL
    PH/Temperature MeterPH4 Calibration Solution - 16ozPH4 Solution - 20mL

    $56.21

    $18.71

    $1.00

    PH4 Solution - 220mL PH7 Calibration Solution - 16oz PH7 Solution - 20mL
    PH4 Solution - 220mLPH7 Calibration Solution - 16ozPH7 Solution - 20mL

    $12.95

    $24.95

    $22.46

    PH7 Solution - 220mL pHep Tester pHTestr 30 - .01 pH Accuracy Temperature Display
    PH7 Solution - 220mLpHEP TesterpHTestr 30 - .01 pH Accuracy Temperature Display

    $14.95

    $79.95

    $131.96

    Prestige PPM/EC/CF Wand Primo - TDS Tester Pro - pH Down - 1qt
    Prestige PPM/EC/CF WandPrimo - TDS TesterPro - pH Down - 1qt

    $74.96

    $37.46

    $9.50

    Probe pH Electrode Pur Gro - pH Probe Industrial Replacement Rapitest - Digital 3-Way Analyzer
    Probe pH ElectrodePur Gro - pH Probe Industrial ReplacementRapitest - Digital 3-Way Analyzer

    $59.96

    $111.71

    $33.71

    Rapitest - Digital Soil Test Kit Rapitest - Electronic 4-Way Tester Rapitest - pH Soil Tester
    Rapitest - Digital Soil Test KitRapitest - Electronic 4-Way TesterRapitest - pH Soil Tester

    $29.96

    $27.71

    $8.95

    Rapitest - Soil Test Kit Replacement pH Sensor PH-200 Replacement Platinum Sensor COM-100
    Rapitest - Soil Test KitReplacement pH Sensor PH-200Replacement Platinum Sensor COM-100

    $14.57

    $44.96

    $29.96

    Replacement probe for HI9026 Replacement Probe for MW801 & MW802 ONLY Replacement Sensor
    Replacement probe for HI9026Replacement Probe for MW801 & MW802 ONLYReplacement Sensor

    $89.96

    $89.96

    $89.96

    Salinity (NaCI) Calibration solution 30g/L Smart 3 in 1 Continuous Monitor/Portable Meter Smart 3 in 1 Meter w/ pH/EC/TDS
    Salinity (NaCI) Calibration solution 30g/LSmart 3 in 1 Continuous Monitor/Portable MeterSmart 3 in 1 Meter w/ pH/EC/TDS

    $29.96

    $299.95

    $274.95

    Soil Conductivity/Salinity Meter w/ Carrying Case Solution - 1382ppm - 220mL Solution - 1382ppm - 230mL
    Soil Conductivity/Salinity Meter w/ Carrying CaseSolution - 1382ppm - 220mLSolution - 1382ppm - 230mL

    $524.96

    $8.74

    $11.69

    Solution - 1413mS/cm - 230mL Solution - 1500ppm - 230mL Solution Starter Kit (PH & Cleaning)
    Solution - 1413mS/cm - 230mLSolution - 1500ppm - 230mLSolution Starter Kit (PH & Cleaning)

    $13.98

    $13.30

    $18.71

    Solution Starter Kit (PH, TDS & Cleaning) SPO Dry Temperature Probe w/ 6ft cord SPO EC/TDS Probe for HI981409 & HI981410
    Solution Starter Kit (PH, TDS & Cleaning)SPO Dry Temperature Probe w/ 6ft cordSPO EC/TDS Probe for HI981409 & HI981410

    $18.71

    $6.20

    $67.46

    Storage Solution - 16oz Tachnaflora - pH Down - 1L Tachnaflora - pH Up - 10L
    Storage Solution - 16ozTachnaflora - pH Down - 1LTachnaflora - pH Up - 10L

    $18.71

    $13.42

    $42.71

    TDS Solution - 1382ppm - 460mL TDS Solution - 1500ppm - 16oz
    TDS Solution - 1382ppmTDS Solution - 1382ppm - 460mLTDS Solution - 1500ppm - 16oz

    $0.75

    $14.75

    $14.78

    TDS-3 Handheld TDS meter Technaflora - pH Down - 10L Technaflora - pH Down - 4L
    TDS-3 Handheld TDS meterTechnaflora - pH Down - 10LTechnaflora - pH Down - 4L

    $27.75

    $38.62

    $21.48

    Technaflora - pH Up - 1L Technaflora - pH Up - 4L Tri Calibration kit PPM/EC - pH 4, pH 7 - 500mL
    Technaflora - pH Up - 1LTechnaflora - pH Up - 4LTri Calibration kit PPM/EC - pH 4, pH 7 - 500mL

    $13.42

    $20.21

    $18.71

    Water Conditioner/Purifier 1qt Waterproof Eco Tester pH1 Waterproof PC Testr 35 (EC & pH)
    Water Conditioner/Purifier 1qtWaterproof Eco Tester pH1Waterproof PC Testr 35 (EC & pH)

    $45.00

    $80.00

    $200.00

    Waterproof pH/Temperature Meter Waterproof PT Testr 35 (pH & TDS) X Nutrients - pH Down 1gal
    Waterproof pH/Temperature MeterWaterproof PT Testr 35 (pH & TDS)X Nutrients - pH Down 1gal

    $120.00

    $200.00

    $27.00

    X Nutrients - pH Down 1qt X Nutrients - pH Up 1gal Green Planet - pH Down - 4L
    X Nutrients - pH Down 1qtX Nutrients - pH Up 1galGreen Planet - pH Down - 4L

    $11.00

    $27.00

    $48.99

    Mad Farmer - Get Down - 1qt Mad Farmer - Get Up - 1qt X Nutrients - pH Down 1qt
    Mad Farmer - Get Down - 1qtMad Farmer - Get Up - 1qtX Nutrients - pH Down 1qt

    $9.74

    $9.74

    $13.00

    X Nutrients - pH Down 1gal X Nutrients - pH Up 1gal X Nutrients - pH Up 1qt
    X Nutrients - pH Down 1gal X Nutrients - pH Up 1gal X Nutrients - pH Up 1qt

    $21.75

    $29.00

    $13.00