UIUZMAR Digital pH Meter pH TDS EC Meter for Hydroponic Nutrient Solution pH and EC Meter with LCD Display TDS Water Tester pH PPM Meter for DWC Setup Aeroponic Growing Tent Indoor Plant Grow

$22.79

YINMIK pH EC Meter for Water Hydroponics, PPM Meter for Nutrients, Measure pH PPM Conductivity Temperature of Hydroponic Garden Water and Nutrient Solution, EC pH TDS Meter for Water, Aquarium, Pool

$42.99

Bluelab METCOMPLUS Combo Meter PLUS for pH, Temperature, and Conductivity in Water and Soil with Easy Calibration, Digital Nutrient (TDS) Testing Kit for Hydroponic System and Indoor Plant Grow

$159.5

Bluelab METCOM Combo Meter for pH, Temperature, Conductivity (Nutrient) in Water with Easy Calibration, Digital TDS Tester for Hydroponic System and Indoor Plants

$29.9

pH/EC Conductivity Meter with ATC Water Quality Tester 0.0-14.0pH / 0~19.99ms/cm Aquarium, Hydroponics Tool

$199

Bluelab Conductivity Pen Meter and Probe Care Kit for Conductivity-Water, Temperature and Nutrient Tester (CF, EC, PPM 500/700) with EC Solution and Cleaner for Hydroponics and Indoor Growing

$195.76

Bluelab METPULSE Pulse Meter Water 3-in-1 Moisture/Nutrient (TDS)/Temperature Test Kit for Garden Soil, Coco, and Solution, Ester for Hydroponic System and Indoor Plant Grow, Clear

$16.9

General Hydroponics pH Control Kit for a Balanced Nutrient Solution

$17.26

Bluelab TRUNV2 Truncheon Nutrient Meter, Digital Conductivity Tester in Water (Scales Include: EC, 500, ppm 700, CF, TDS) Tool for Hydroponic System and Indoor Plant Grow, White

$37.99

Bluelab METMULTI Multimedia Meter for Water, Soil, Coco, Rockwool, Rootzone Measurements with Easy Calibration and Leap pH Probe Digital Testing Kit for Hydroponic System and Indoor Plant Grow, Clear

$184.8

2 in 1 Temperature pH Monitor Meter Tester Sensor Test Kit 0~14 pH Automatic Calibration BNC Electrode Probe for Hydroponic ph Aquarium Meter Water Lab Food Drinking Water pH of Saltwater/Seawater

$19.99

Hydroponics Growing System Indoor Garden: Herb Garden Kit Indoor with LED Grow Light Quiet Smart Water Pump Automatic Timer Healthy Fresh Herbs Vegetables - Hydroponic Planter for Home Kitchen Office

$119.99

PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium

$22.99

VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified

$29.99

Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow

$29.9

YINMIK pH Meter, Digital pH Tester for Hydroponics, pH Temp Meter with Horizontal Display for Pool, Spa, Hot Tub, Indoor Plants, Koi Ponds, Drinking Water, Wine Beer Making, Aquarium, Aquaculture

$24.69

AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

$19.99

General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon

$16

Hydroponics Growing System Indoor Garden: 8 Pods Herb Garden Kit Indoor with LED Grow Light Quiet Smart Water Pump Automatic Timer Healthy Fresh Herbs Vegetables - Hydroponic Planter for Home Kitchen

$119.99

Water Conductivity Sensor, Domestic Water Hydroponics Sensor with Waterproof Probe for Liquid Quality Monitoring Detection Tester Module Parts

$9.95

Apera Instruments AI104G GroStar Series GS4 pH/EC/500ppm/700ppm Combo 5-in-1 Pen Tester Kit with Replaceable Double-Junction pH/EC Probe for Hydroponics Water Quality Testing, Gen II

$42.69

PmoYoKo Digital pH/TDS Meter with ATC pH Tester, 3 in 1 pH TDS Temp 0.01 Resolution High Accuracy pH Tester with LCD Backlit, TDS Meter pH Meter for Water, Wine, Pool, Hydroponics and Aquariums

$6.99

Fulsren 12-Pod Hydroponic Indoor Garden System with LED Grow Lights, Height Adjustable Planters, and Auto Timer for Herbs and Plants

$53.03

Bluelab STSOL120 KCL Storage Solution 120ml pH Probe and Pen, Maintain Meters Used for Water, Soil, and Hydroponic System or Indoor Plant Grow White

$9.99

HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc

$93.5

Digital pH and TDS Meter Kit - 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy - 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium (pH Meter Kit)

$89.54

Hydroponic Gardening

$74.87

Bluelab PROBPH pH Probe for Water, Replacement Electrode for Meter, Monitor, and Controller with Easy Calibration, Tool for Hydroponic System and Indoor Plant Grow

$88.39

General Hydroponics CALiMAGic for Gardening, 2.5-Gallon

$16.9

TDS Meter Digital Water Quality Tester for RO-RODI System Drinking Water,Aquariums, Hydroponics,0-9990 ppm Measuring Range,1 ppm Increments,2% Readout Accuracy（Green）

$40.02

iPstyle Digital TDS Meter Water Tester, PPM Water Quality Tester Measuring Range 0-9999ppm, Ideal for Drinking Water, Swimming Pool, Aquariums, Hydroponics (Grey) (TDS)

$42.69

5 in 1 TDS Meter PH Tester, 0.01 High Accuracy Digital PH Meter for Water, PH/TDS/EC/Salt/Temp Tester, PPM Meter Water Tester for Drinking Water, Hydroponics, Plants, Aquarium and Pool

$12.97

JiocoVino Digital pH/TDS Meter for Water Quality, Waterproof Water Tester with Backlit Measurement 0-9990pm for Drinking Swimming Pool Hydroponic Aquarium (Milky White, 4 in 1 Water Tester)

$19.99

General Hydroponics pH Test Indicator 8 oz Ounces - up Down Wide Spectrum

$38.88

pH Up and pH Down Control Kit — 250 mL (8.4 fl oz) Each — Achieve The Perfect pH — Great for Hydroponics

$19.65

GH General Hydroponics pH Up and pH Down 1 Quart Combo Kit Water Adjuster Buffer

$86.13

TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (Green)

$42.15

Hydroponics Growing System Indoor Garden: URUQ 12 Pods Indoor Gardening System with Remote Control LED Grow Light Height Adjustable Quiet Plants Germination Kit - Gardening Gifts for Women Black

$6.79

YINMIK Digital pH Meter for Food, pH Probe for Sourdough and Bread Dough, Checking The pH of Fermenting Sausages and Salami, Waterproof pH Tester for Solid and Liquid Soft Soil Sample

$12.99

Hydroponics Growing System Indoor Garden - Herb Garden with Grow Light, 15 Pods Stainless Steel Indoor Garden Kit, Auto Timer, Gardening Gift for All Ages

$44.99

4 in 1 Digital pH Meter for Water, ±0.01 Resolution High Accuracy Tds Meter Digital Water Tester with ATC pH Tester, Water Tester for Drinking Water, Brewing, Hydroponics, Wine, Pool and Aquarium

$189.28

Hydroponics: The Kratky Method: The Cheapest And Easiest Hydroponic System For Beginners Who Want To Grow Plants Without Soil

$17.89

Hydroponics: The Kratky Method: The Cheapest and Easiest Hydroponic System for Beginners Who Want to Grow Plants Without Soil

$21.83

WeAQUA TDS Meter AI-Supported Self-Calibrating for Accurate Results - Total Dissolved Solids Meter- Water Quality Meter Ideal for Drinking Water, Aquariums, Hydroponics, TDS and PPM Measurement

$119.99

TDS Meter Digital Water Tester,WoEluone 3 in 1 TDS,Temperature and EC Meter,Accurate Ideal PPM Meter for Drinking Water, Aquariums,RO System and More

$34

GISNPA 7 in 1 pH/TDS/EC/ORP/S.G/Salinity/Temp Meter with ATC pH Tester, 0.01 Resolution High Accuracy Digital pH Meter, Water Tester for Drinking, Hydroponics, Swimming Pool and Aquarium

$29.95

CANNABMALL PH Meter, TDS PPM Meter and 3 in 1 Soil Moisture Meter Combo, High Accuracy Lab PH/EC Tester Digital Kit [Upgraded] for Home Water, Hydroponics, Plants Garden Soil and Aquarium PH Pen

$22.79

YINMIK Digital pH Tester for Soil, Soil pH Test Kit for Indoor Potted Plants, Professional pH Meter for Soil and Water, Measuring Soil pH for Garden, Grass,Lawn, Greenhouse,Outdoor,Farming, Yard Use

$9.97

FOLLOWIN pH Up and Down Control Kit (9oz+9oz), Hydroponics pH Tester Calibration Adjuster Buffer Solution Combo for Soil Gardening Plants Pool A Balanced Nutrient

$3.84

Garden hydroponic Growing System Indoor with 3 led Grow Light Modes,Indoor Grow Kitcan,be Used Anywhere Indoors,herb Garden

$159.99

TDS Meter Digital Water Tester - PPM Quality Testing Tool 3-in-1 (TDS, EC & Temp) High Accuracy ATC Tester, Nutrient Testing Pen for Hydroponics, Monitor Ro System, Pools, Aquariums & Saltwater Tanks

$538.67

CIHOPE pH and TDS Meter Combo, Professional pH Meter for Water pH Tester Digital pH Pen, 3-in-1 EC Temperature TDS Meter Digital Water Tester for Drinking Water, Hydroponics, Pool and Aquarium

$42.69

Hydroponics Growing System, 12 Pods Hydroponics Growing System Indoor Garden with LED Grow Light, Height Adjustable Indoor Gardening System, Hydroponic Growing System Built-in Timer Function

$119.99

YINMIK Food pH Meter with Extra pH Replaceable Probe,Digital pH Tester for Sourdough and Bread,Food pH Tester for Meat,Canning,Cheese,Solid Samples, Soft Soil and Water

$26.99

Hanna Instruments HI 9813-6N Waterproof pH/EC/TDS Temperature Meter Clean and Calibration Check for Growers, 0 to 50 Degree C, 9V Battery

$229

RCYAGO PH Meter, 5 in 1 PH/TDS/EC/Salinity/Temp Meter with ATC, 0.01 Resolution High Accuracy Water Testing for Drinking Water, Hydroponics, Seawater, Aquariums, Fish Tank and Swimming Pools

$10.79

Banger Labs Hydroponic Nutrient Kit – Grow, Bloom, Micro Plant Food for Growing Vegetables Fruits Flowers Herbs for Indoor & Outdoor Soil | Ideal for Hydroponics and Potted Plants

$318

VIVOSUN Hydroponic Grow Kit, 54 Plant Sites 6 Food-Grade PVC-U Pipes Hydroponics Planting System with Water Pump, Pump Timer, Nest Basket and Sponge for Leafy Vegetable

$194.39

ZISIZ Hydroponics Growing System：Indoor Garden Kit,(SPD2023)

$19.99

apine Soil Moisture Meter, Plants Moisture Meter, Plant Water Meter for Indoor/Outdoor Plants， Hydrometer for Plants（Green）

$6.59