pH, EC, PPM, TDS

Whether you indulge in indoor gardening, outdoor gardening or hydroponics growing, the proper balance of the growing environment determines the health of your plants... Here are some tools to help gain and maintain the proper balance your plant's environment.

  • pH: (chemistry) p(otential of) H(ydrogen)
  • TDS: total dissolved solids
  • PPM: parts per million
  • EC: electrical connectivity
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Calibration Solution allows you to calibrate your meter in moments.
Calibration Solution allows you to calibrate your meter in moments.
Calibration Solution allows you to calibrate your meter in moments.
$16.56 - $46.93
Advanced Nutrients pH balancing products are pure concentrates and have not been diluted.
$16.56 - $46.93
Advanced Nutrients pH balancing products are pure concentrates and have not been diluted.
The Bluelab Carry Case provides a custom fit so you can use and read your Bluelab Meter right from the carrying case. Simply zip it closed and your meter is protected during storage or transport.
The Bluelab Combo Meter tests conductivity (nutrient), pH levels, and temperature, all in one convenient lightweight unit.
The level of conductivity is directly proportional to the amount of salts dissolved in water. The conductivity of your nutrient solution is a measurement of its strength, indicated by the actual amount of salts dissolved.
Bluelab 2.77EC Solution is used as a reference or checking solution to ensure the cleanliness and proper functionality of EC/CF probes.
All of the essential tools you need to easily manage your crop by measuring the pH, conductivity (ppm) and temperature of the nutrient solution.
The Bluelab Guardian Monitor measures all three critical parameters to successful plant growth - pH, conductivity and temperature.
$179.95
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The Bluelab pH Meter is used to accurately measure the pH value of nutrient solution.
The Bluelab pH Pen has been specially developed as an affordable, effective tool for hobby or small scale growers.
The Bluelab pH Probe is used to measure the pH of a solution.
Experienced growers suggest a pH level between 5.5 and 6.5 for most hydroponically grown plants. A dirty pH probe can skew the readings of your pH meter, resulting in a harmful growing environment.
?Maximize the life and response time of Bluelab pH pens and pH probes with this KCI Storage Solution.
The Bluelab ppm Pen measures conductivity and temperature to ensure your plants are receiving the proper amounts of nutrients.
Everything you need to keep your pH probe clean and maintain accurate readings with the BlueLab Probe Care Kit!
The Bluelab Soil pH Meter is a reliable pH meter that provides accurate readings of soil or hydroponics growing media.
The Bluelab Soil pH Pen provides both pH and temperature readings of soil and grow media, an effective tool for hobby or small scale gardeners.
The Bluelab Soil pH Probe serves as original equipment replacement for the Bluelab Soil pH Meter, but can also be attached to the Bluelab Combo Meter.
The Bluelab Truncheon Meter is the best selling hydroponics CF / EC Meter in the world. The Truncheon meter measures EC, CF and PPM scales.
Highly concentrated pH adjusters that help hold the pH in your reservoir stable for a long period of time.
$9.50 - $21.95
Earth Juice Double Up and Double Down are potent pH adjusters that can be used in hydroponics systems or with soil based gardens.
Earth Juice Double Up and Double Down are potent pH adjusters that can be used in hydroponics systems or with soil based gardens.
Earth Juice Double Up and Double Down are potent pH adjusters that can be used in hydroponics systems or with soil based gardens.
$14.31 - $49.95
Proper pH levels are crucial for healthy plant growth. A pH that is too high or too low can reduce the availability of some nutrients causing plant stress.
Proper pH levels are crucial for healthy plant growth. A pH that is too high or too low can reduce the availability of some nutrients causing plant stress.
Proper pH levels are crucial for healthy plant growth. A pH that is too high or too low can reduce the availability of some nutrients causing plant stress.
$74.95
The EC Dipstick is one of the easiest meters to use, providing the 4 most popular scales: EC, CF, 500:1ppm, and 700:1ppm!
$72.50
The EcoTestrâ„¢ pH 2 has an easy-to-read display and its ergonomically designed LC display allows you to read measurements in a glance.
You can double the life of your pH tester when using Electrode Cleaning Solution on a regular basis.
Use storage solution to greatly extend the life of your pH meter or tester probe. This step is important for ensuring that your equipment retains its accuracy.
Espoma Organic Garden Lime is pellitized for easy application and is much safer than hydrated lime.
Espoma organic Soil Acidifier is an effective way to lower soil pH to its optimal range for acid loving plants such as rhododendrons, azaleas and hydrangeas.
We all know that the pH level in your hydroponics system is critical to optimum plant health.
We all know that the pH level in your hydroponics system is critical to optimum plant health.
The General Hydroponics pH Test Kit measures the pH level of your hydroponics nutrient solution.
$11.95 - $27.95
We all know that the pH level in your hydroponics system is critical to optimum plant health. Most plants require pH levels between 5.5 and 6.8.
$11.95 - $27.95
We all know that the pH level in your hydroponics system is critical to optimum plant health. Most plants require pH levels between 5.5 and 6.8.
$14.25 - $36.75
General Hydroponics Calibration Solutions are specifically formulated for electronic pH meter calibrations and designed for hydroponic solution determinations.
General Hydroponics Calibration Solutions are specifically formulated for electronic pH meter calibrations and designed for hydroponic solution determinations.
General Hydroponics Calibration Solutions are specifically formulated for electronic pH meter calibrations and designed for hydroponic solution determinations.
This pH Control Kit by General Hydroponics includes everything you need to check and maintain the proper pH levels for your indoor garden.
Need a refill for your General Hydroponics pH testing kit?
$22.95 - $143.95
Nectar for the Gods Hades Down is used to lower the pH level of nutrient solution.
HANNA buffer solutions packets are perfect for single use calibration of your pH, EC TDS or Combo tester.
The electrode on a pH tester or monitor must be keep moist at all times to prevent damage to the tool.
Model HI 98106: The Hanna Instruments Champ pH Tester is an affordable, easy-to-use pH pen that is ready-to-use right out of the box.
Model HI 98103: At the cost of just a few rolls of litmus paper, you can have the industry's best pocket-sized pH tester, made by Hanna Instruments!
Model HI 991404: A large backlit LCD continuously monitors the three most important nutrient parameters in greenhouse, hydroponics and horticultural applications.
Model HI 98129: pH/EC/TDS/Temperature tester by Hanna Instruments has a completely waterproof shell that also floats. It offers high accuracy readings with dual-level LCD readout.
Model HI 98311: Hanna Instruments DIST 5 EC/TDS/temperature tester is waterproof. It even floats. Guages temperature from 0.0 to 60.0 °C or 32.0 to 140.0 °F.
Model HI 1285-6 preamplified pH and EC Probe with CAL CHECK is the replacement probe for the Hanna Instruments HI 9813-6N Portable Meter.
The Hanna Instruments HI 9813-6N pH/EC/TDS/°C Portable Meter is specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries.
Model HI 98128 (pHep 5): This Hanna Instruments waterproof tester features a dual-level LCD that gauges pH level -2.00 to 16.0, and temperature from 23.0 to 140.0 °F (-5.0 to 60.0 °C).
The Hanna Instruments HI 710007 Shockproof Rubber Boot is designed to be used with the HI 9813-6(N) portable pH/EC/TDS/temperature meter.
The Hanna Instruments Combo pH/ES/TDS/Temp Tester Spare Electrode can be replaced to renew function and accuracy for your Hanna Instruments Brand Tester.
Hydrion Insta-Chek pH Paper comes in a convenient plastic holder that contains a 15 foot roll of ph test paper, enough for about 1000 pH tests.
Litmus paper strips are an easy-to-use alternative to check nutrient solution when you do not have a pH tester on hand.
The Milwaukee Instruments Martini EC59 multi pocket tester measures and displays EC TDS and Temperature simultaneously on an easy to ready display.
The Mi56P replaceable electrode is used with Martini pH55 and pH56 pH / temperature meters.
The Milwaukee Instruments Martini pH55 Waterproof pH & Temperature tester has a large display with graphic symbols to help guide you through all operations.
The Milwaukee MW100 portable pH meter replaces the model SM100 and is a no-frills low-cost tool that is ideal for beginners.
The Milwaukee pH600 Tester is an easy-to-use, economical instrument that measures quick and reliable pH values.
The Milwaukee MW802 portable 3-in-1 meter allows you to measure pH, EC (conductivity) and TDS with just one instrument using a single probe. (replaces model SM802)
The Milwaukee SE600 pH/EC/TDS combination probe is the replacement for both MW801 and MW802 models of combo meters.
When you need continuous reservoir readouts of pH, TDS and temperature, the Nutradip Trimeter is your solution.
The waterproof Oakton Multiparameter PCS Testr 35 is a pocket-sized meter used for pH, TDS and temperature readings.
$12.50 - $71.95
Nectar for the Goods Olympus Up is a liquid lime pH booster that is also a terrific source of calcium for your garden.
The Rapitest Digital Soil pH Meter is an easy-to-use soil pH tester that determines soil acidity and alkalinity.
The Rapidest Soil pH Tester is designed to give accurate pH level results with relatively little effort.
Ideal for testing soil pH levels of your indoor potted plants or outdoor garden areas. The Rapitest Soil pH Meter measures pH levels from 3.9 to 9.0.
Model HI 991404: A large backlit LCD continuously monitors the three most important nutrient parameters in greenhouse, hydroponics and horticultural applications.
Model HI 98103: At the cost of just a few rolls of litmus paper, you can have the industry's best pocket-sized pH tester, made by Hanna Instruments!
This is the original equipment from Milwaukee that replaces the pH electrode on model MW100, MW101 and MW102 pH water testers.
SaferGro pH Down is a great way to improve nutrient uptake by naturally lowering the pH of alkaline soils and hydroponic solutions.
SaferGro pH Down is a great way to improve nutrient uptake by naturally lowering the pH of alkaline soils and hydroponic solutions.
Calibration Solution allows you to calibrate your meter in moments.
The Sunleaves Digital 4-Way Soil Meter is a great tool for outdoor gardeners or indoor gardeners growing plants potted in soil.
Prevent damage to the electrode in your pH meter or tester during storage with a few drops of Sunleaves pH Electrode Storage Solution.
With the Sunleaves pH Expert Plus, measuring the pH in your reservoir is a snap! This handheld waterproof pH meter automatically compensates for the temperature of your nutrient solution to give you an extremely accurate reading.
The Sunleaves pH Test Kit gives hydroponic gardeners a simple, foolproof method of getting fast, accurate pH readings.
Monitor soil pH on a scale of 4 to 8 with the durable, easy-to-read Sunleaves Soil pH Tester.
Sunleaves Soil Sweetener is made from pulverized dolomitic limestone, an all-natural amendment that dissolves sour, acidic buildup in soil.
This is original equipment for the Sunleaves pH Expert Plus.
The STEP505 replacement probe is the same high-quality component that ships with the Sunleaves TDS Expert Plus.
Measures nutrients levels from 0-9990 ppm with accuracy to ± 0.2%.
The Sunleaves TDS Expert Plus is a highly-advanced handheld meter that measures nutrient solution electrical conductivity (EC), total dissolved solids (TDS), and liquid temperatures.
Conveniently test the moisture, light, and pH levels of your plants with the Sunleaves Three-Way Meter.
$7.25 - $14.95
Technaflora pH UP and Technaflora pH DOWN help maintain optimum pH levels for your hydroponically grown plants.
$7.25 - $14.95
Technaflora pH UP and Technaflora pH DOWN help maintain optimum pH levels for your hydroponically grown plants.
This original equipment replacement probe fits the Nutradip tri-meter.