 |
 | | Hydroponics : HM Digital Meters Waterproof pH/Temperature Meter
$119.95 | |  | | Hydroponics : Dutch Master DM Buffer pH 7.0, 500mL
$13.50 |
|
|
 | | Hydroponics : General Hydroponics pH Down Dry 16 Pounds. Acid
$64.98 | |  | | Hydroponics : Milwaukee Instruments Milwaukee pH Continuous Monitor with Cal Test
$105.95 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee TDS Continuous Monitor with Cal-Test
$105.95 | |  | | Hydroponics : Hanna Instruments Mini pH Controller
$182.95 |
|
|
 | | Hydroponics : Milwaukee Instruments MA 850 Replacement probe for SM801/SM
$99.95 | |  | | Hydroponics : Hanna Instruments GroChek EC Tester
$112.95 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee pH - EC - TDS KIT
$246.95 | |  | | Hydroponics : Dutch Master DM Buffer, 2.76Ms/Cm2
$8.50 |
|
|
 | | Hydroponics : Green Air Products Inc. pH 4.01 Buffer, 16 Ounces
$17.50 | |  | | Hydroponics : Green Air Products Inc. pH 7.01 Buffer, 16 Ounces
$17.50 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee EC hand meter SM301
$111.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee TDS hand held
$111.95 |
|
|
 | | Hydroponics : Dutch Master DM Buffer pH 4.0, 500mL
$13.50 | |  | | Hydroponics : Dutch Master DM Buffer 1400 Parts Per Million 500mL
$13.50 |
|
|
 | | Hydroponics : HM Digital Meters TDS-3 Handheld TDS meter
$44.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee TDS continuous read
$118.95 |
|
|
 | | Hydroponics : Hanna Instruments Salinity (NaCI) Calibration solution 30g-l.
$26.95 | |  | | Hydroponics : Nutradip (Tri Meter) Nutra-Dip continuous EC meter
$104.95 |
|
|
 | | Hydroponics : Hanna Instruments GroChek TDS Tester
$112.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee pH hand meter SM101
$120.95 |
|
|
 | | Hydroponics : Botanicare Ph Adjuster Solutions Ph High, 1 Gallon
$34.95 | |  | | Hydroponics : Oakton Oakton Calibration Solution 15,000 uS, case of 20
$38.95 |
|
|
 | | Hydroponics : Hanna Instruments GroChek EC Electrode
$56.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee EC continuous read
$118.95 |
|
|
 | | Hydroponics : Oakton Oakton pHTestrs replacement sensor
$90.95 | |  | | Hydroponics : Hanna Instruments pH Combo Electrode Glass Body - Refillable Temp. Sensor
$172.95 |
|
|
| | Hydroponics : Hanna Instruments 12880 S/cm Calibration Solution, 25 x 20mL, case of 25
$33.95 | | | | Hydroponics : Oakton Oakton Waterproof EC Tester 11+
$143.95 |
|
|
| | Hydroponics : Oakton Oakton Waterproof EC tester
$108.95 | | | | Hydroponics : Oakton Oakton waterproof Total Disolved Solids
$92.95 |
|
|
 | | Hydroponics : Nutradip (Tri Meter) Nutra-Dip continuous pH meter
$138.95 | |  | | Hydroponics : Hanna Instruments GroChek replacement probe for HI9813-0
$119.95 |
|
|
 | | Hydroponics : Oakton Oakton pHTestr 20 - .01 pH Accuracy *ATC
$133.95 | |  | | Hydroponics : Oakton Oakton Replaceable Electrodes pH WP 2 Pen
$69.95 |
|
|
 | | Hydroponics : Hanna Instruments Replacement pH Electrode for HI98127, HI98128, HI98129, & HI98130
$63.95 | |  | | Hydroponics : SpectraPure ( R.O. Filters) In Line Dual TDS Meter
$54.95 |
|
|
 | | Hydroponics : Oakton Oakton Low/High/EC High Replacement Sensor
$65.95 | |  | | Hydroponics : Hanna Instruments GroChek Hanna pH/EC/TDS/C/PPT Pocket Tester
$202.95 |
|
|
 | | Hydroponics : General Hydroponics pH 7.0 Calibration Solution 8 Ounces
$11.98 | |  | | Hydroponics : Active Air ActiveAir Soil Ph Tester
$12.95 |
|
|
 | | Hydroponics : Batteries for pH/TDS pen, pack of 4
$11.95 | |  | | Hydroponics : Hanna Instruments Combo pH/EC/TDS/C/PPM Tester
$202.95 |
|
|
 | | Hydroponics : Hanna Instruments DiST 1 TDS Tester
$76.95 | |  | | Hydroponics : Bluelab Bluelab pH Truncheon
$184.95 |
|
|
 | | Hydroponics : Milwaukee Instruments PH7 Solution, 220ml
$14.95 | |  | | Hydroponics : Hanna Instruments pH Electrode with 2 m (6.6') cable for HI981401N & HI981404N
$63.95 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee Waterproof pH Tester
$76.95 | |  | | Hydroponics : General Hydroponics pH Up 8 Ounces Base
$12.98 |
|
|
 | | Hydroponics : Oakton Oakton Waterproof TDS Tester Low (0-1990 ppm / 1% FS)
$101.95 | |  | | Hydroponics : Hanna Instruments pHep
$67.95 |
|
|
 | | Hydroponics : Oakton Oakton pHTestr 10 - .1 pH Accuracy ATC*
$123.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee TDS T75 Tester WP
$78.95 |
|
|
 | | Hydroponics : Hanna Instruments 1382ppm Solution, 230ml
$19.95 | |  | | Hydroponics : HM Digital Meters Waterproof EC/TDS/Temp Combo Meter
$79.95 |
|
|
 | | Hydroponics : Milwaukee Instruments PH4 Solution, 220ml
$14.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee Sugar Refractometer
$116.95 |
|
|
 | | Hydroponics : Oakton Oakton pHTestr 30 - .01 pH Accuracy Temperature Display *ATC
$152.95 | |  | | Hydroponics : Milwaukee Instruments Milwaukee TDS T76 Tester WP
$78.95 |
|
|
 | | Hydroponics : General Hydroponics pH 4.01 Calibration Solution 8 Ounces
$11.98 | |  | | Hydroponics : Hanna Instruments Hanna pHEP 4 Meter
$114.95 |
|
|
 | | Hydroponics : Green Air Products Inc. pH 7.01 Buffer, 8 Ounces
$13.75 | |  | | Hydroponics : Active Air ActiveAir 3 - Way Meter
$14.95 |
|
|
 | | Hydroponics : Hanna Instruments Champ pH Tester
$63.95 | |  | | Hydroponics : Hydrofarm Hydro RX Water & Soil
$44.95 |
|
|
 | | Hydroponics : General Hydroponics pH Test Kit, 1 Ounce
$11.98 | |  | | Hydroponics : Hanna Instruments 1413mS/cm Sol. 230mL
$19.95 |
|
|
 | | Hydroponics : Oakton Oakton Replaceable Electrodes pH WP 1 Pen
$55.95 | |  | | Hydroponics : Green Air Products Inc. pH 4.01 Buffer, 8 Ounces
$13.75 |
|
|
 | | Hydroponics : Bluelab Bluelab Truncheon
$140.00 | |  | | Hydroponics : Nutradip (Tri Meter) Probe pH Electrode
$70.95 |
|
|
 | | Hydroponics : Active Air ActiveAir Moisture Meter
$11.95 | |  | | Hydroponics : Oakton Oakton Waterproof EC Tester High (0-19.90 mS / 1% FS)
$101.95 |
|
|
 | | Hydroponics : Milwaukee Instruments EC65 Waterproof Tester
$81.95 | |  | | Hydroponics : Hanna Instruments GroChek replacement probe for HI9813
$116.95 |
|
|
 | | Hydroponics : Oakton Oakton Waterproof TDS Tester High (0-10.00 ppt 1% FS)
$101.95 | |  | | Hydroponics : General Hydroponics pH Down 8 Ounces Acid
$12.98 |
|
|
 | | Hydroponics : General Hydroponics pH Test Indicator 8 Ounces
$14.98 | |  | | Hydroponics : Hanna Instruments GroChek pH Tester
$112.95 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee Double Junction pH Electrode w/ 1 meter cable
$53.95 | |  | | Hydroponics : Oakton Oakton Waterproof EC Tester Low (0-1990)
$101.95 |
|
|
 | | Hydroponics : Oakton Oakton Waterproof pH Tester Basic
$93.95 | |  | | Hydroponics : Bluelab Commercial Truncheon
$139.95 |
|
|
 | | Hydroponics : Hanna Instruments DiST 5 EC/TDS Meter
$131.95 | | | | Hydroponics : American Hydroponics Nutritest 2 Ounces Cal Sol 27.7 for Truncheon
$9.95 |
|
|
| | Hydroponics : Bluelab 4.0 250 ML Calibration Solution
$15.00 | | | | Hydroponics : Bluelab 7.0 250 ML Calibration Solution
$15.00 |
|
|
| | Hydroponics : Hanna Instruments 1500PPM Solution, 230ml
$19.95 | | | | Hydroponics : Milwaukee Instruments Milwaukee pH hand meter SM100
$109.95 |
|
|
| | Hydroponics : Cal Sol 1380 parts per million, 2 Ounces
$10.98 | | | | Hydroponics : Hydro-Logic DM-2 Industrial Dual TDS Monitor
$80.00 |
|
|
| | Hydroponics : Oakton Oakton Ultra Basic pH Tester
$79.95 | | | | Hydroponics : Hanna Instruments 1000ppm Calibration Solution
$11.95 |
|
|
| | Hydroponics : Oakton Oakton TDS Tester Ultra Basic
$86.95 | | | | Hydroponics : Oakton Oakton Waterproof TDS Tester11+
$143.95 |
|
|
| | Hydroponics : Hanna Instruments Gro'chek replacement probe for HI9813-6
$127.95 | |  | | Hydroponics : Hanna Instruments Storage Solution, 16 Ounces
$22.95 |
|
|
 | | Hydroponics : Oakton pH 4.01 Solution, case of 20
$37.95 | |  | | Hydroponics : Hanna Instruments PH4 Calibration Solution, 16 Ounces
$22.95 |
|
|
 | | Hydroponics : Hanna Instruments Electrode Cleaner 16 Ounces
$23.95 | |  | | Hydroponics : Nutradip (Tri Meter) Nutra-Dip continuous TDS meter
$104.95 |
|
|
 | | Hydroponics : Milwaukee Instruments PH7 Solution, 20ml, case of 25
$26.95 | | | | Hydroponics : Green Air Products Inc. Electrode Cleaner Twin Pack, 2x8 Ounces
$22.50 |
|
|
 | | Hydroponics : Hanna Instruments 1382ppm TDS Sol, 460ml
$21.95 | |  | | Hydroponics : Hanna Instruments PH7 Calibration Solution, 16 Ounces
$22.95 |
|
|
| | Hydroponics : Bluelab 4.0 500 ML Calibration Solution
$23.00 | |  | | Hydroponics : Bluelab BlueLab Combo Meter
$255.00 |
|
|
 | | Hydroponics : Hydrofarm Pro pH Up 1 Pint.
$11.50 | |  | | Hydroponics : Hydrofarm Pro pH Down 1 Pint.
$11.50 |
|
|
 | | Hydroponics : Hanna Instruments GroChek Hanna EC/TDS Monitor w/ HI7632 EC Probe
$116.95 | |  | | Hydroponics : Hanna Instruments pH 7.01 Calibration Solution, 25 x 20mL, case of 25
$35.95 |
|
|
| | Hydroponics : Green Air Products Inc. 1413uS & 1500 PPM Calibration Kit, Twin Pack 2x8 Ounces.
$22.50 | | | | Hydroponics : Bluelab 7.0 500 ML Calibration Solution
$23.00 |
|
|
 | | Hydroponics : Hanna Instruments GroChek EC/TDS Monitor
$128.95 | |  | | Hydroponics : Hanna Instruments 1413 S/cm (EC) Calibration Solution, 25 x 20mL, case of 25
$35.95 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee 3 function SM802
$205.95 | |  | | Hydroponics : Milwaukee Instruments PH4 Solution, 20ml, case of 25
$26.95 |
|
|
 | | Hydroponics : Hanna Instruments 1382 PPM@25C Calibration Solution, 25 x 20mL, case of 25
$35.95 | |  | | Hydroponics : Hanna Instruments GroChek Hanna pH Indicator
$116.95 |
|
|
 | | Hydroponics : Bluelab Nutrient Probe Cleaning Kit
$25.00 | |  | | Hydroponics : Hanna Instruments pH 4.01 Calibration Solution, 25 x 20mL, case of 25
$35.95 |
|
|
 | | Hydroponics : General Hydroponics pH Control Kit
$20.98 | |  | | Hydroponics : Milwaukee Instruments 1382 TDS Solution, case of 25
$26.95 |
|
|
 | | Hydroponics : Hanna Instruments 1500 PPM@25C Calibration Solution, 25 x 20mL, case of 25
$35.95 | |  | | Hydroponics : Milwaukee Instruments 1500 ppm Packet, case of 25
$26.95 |
|
|
 | | Hydroponics : Hanna Instruments GroChek pH/EC/TDS Meter
$239.95 | |  | | Hydroponics : General Hydroponics pH Down Dry 1.5 Pounds. Acid
$17.98 |
|
|
 | | Hydroponics : General Hydroponics pH Up Dry 1.5 Pounds. Base
$17.98 | |  | | Hydroponics : Green Air Products Inc. pH Meter Maintenance (pH 4.01, pH 7.01, Electrode Storage Cleaner) Tri-Pack 3x8 Ounces
$31.25 |
|
|
 | | Hydroponics : Milwaukee Instruments Milwaukee pH continuous read
$118.95 | |  | | Hydroponics : Green Air Products Inc. Meter Maintenance (Cleaning & Storage Solutions) Tri-Pack
$31.25 |
|
|
 | | Hydroponics : General Hydroponics pH Down 1 Gallon Acid
$34.98 | |  | | Hydroponics : General Hydroponics pH Up Dry 16 Pounds. Base
$64.98 |
|
|
 | | Hydroponics : Nutradip (Tri Meter) Nutra-Dip continuous Tri meter (pH, PPM & Temperature)
$238.95 | |  | | Hydroponics : Hanna Instruments GroChek pH/EC/TDS/C Meter w/Cal-Check Feature
$280.95 |
|
|
 | | Hydroponics : Nutradip (Tri Meter) Nutra-Dip continuous Tri meter (pH, EC & Temperature)
$238.95 | |  | | Hydroponics : Hanna Instruments GroChek pH/EC/TDS/Temp. Combo
$203.95 |
|
|
 | | Hydroponics : Hanna Instruments GroChek pH & TDS Combo Continuous Reading Meter
$187.95 | |  | | Hydroponics : General Hydroponics pH 7.0 Calibration Solution 1 Quart.
$29.98 |
|
|
 | | Hydroponics : General Hydroponics pH 4.01 Calibration Solution 1 Quart.
$29.98 | |  | | Hydroponics : Hydrofarm Pro pH Down 1 Quart.
$14.50 |
|
|
 | | Hydroponics : Technaflora pH UP, 1 Liter
$14.33 | | | | Hydroponics : Green Air Products Inc. 1413uS & 1500 PPM Calibration Kit, Twin Pack 2x16 Ounces
$30.00 |
|
|
 | | Hydroponics : Hydrofarm Pro pH Up 1 Quart.
$14.50 | |  | | Hydroponics : General Hydroponics pH Down 1 Quart. Acid
$17.98 |
|
|
 | | Hydroponics : Technaflora pH Down, 1 Liter
$14.33 | |  | | Hydroponics : General Hydroponics pH Up 1 Quart. Base
$17.98 |
|
|
 | | Hydroponics : Bluelab pH Probe Cleaning & Calibration Kit
$30.00< |
