PH Tester, Control and Maintenance

Bluelab Calibration Solution Sachets pH 7.0, 4.0 & 2.77 EC

Starting at: $7.25

Bluelab's 2.77EC Conductivity Solution, pH 7.0 and pH 4.0 Calibration Solutions are now available in 20ml sachets. pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). The 2.77EC Conductivity solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/CF probe. Calibration Solutions should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. They should be stored with the lids securely tightened. Learn More

General Hydroponics pH Test Kit

$7.99

General Hydroponics pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator, and observe the coloration of the liquid in the test vial. Many growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use. Learn More

Luster Leaf Rapitest pH Soil Tester Capsule Kit Model 1612

$9.35

Kit includes: Color comparator 10 pH test capsules Complete instructions for adjusting soil pH and pH preferences list for over 450 plants for the home, yard and garden. All you do is put a sample of soil into the comparator, add powder capsule, add water, shake and watch the color develop. Then, note your results. Fast, easy and it only takes a few minutes. Learn More

General Hydroponics pH 4.01, pH 7.01, 1500 PPM Solutions

Starting at: $9.85

General Hydroponics™ uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics™ technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used. Learn More

Bluelab pH 4.0, pH 7.0, EC 2.77 Solution

Starting at: $10.65

The Bluelab Calibration Solutions are a very necessary part of a growers toolbox. They are required for the calibration and checking of Bluelab meters and controllers. These solutions are manufactured specific to the calibration process and referenced to high class laboratory standards by Bluelab. Learn More

Bluelab Probe Care Kit Conductivity

$14.75

Everything you need to clean and test conductivity (ppm/EC) / temperature probes. The instrument is only as accurate as the probe is clean. Accurate readings simplify crop management and provide improved growth. Proper ppm/EC probe maintenance also ensures you maximize the life of the probe and instrument. The probe surface is where the instrument takes the reading of the solution. If the probe face is dirty or contaminated, the readings may be inaccurate. Much like the windshield of a car, if it’s dirty you can’t see out! If the probe face is dirty, it cannot read the solution. Learn More

General Hydroponics pH Test Indicator - 8 oz

$14.95

General Hydroponics pH Test Kits make pH testing easy.

Fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator, and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to expensive electronic meters because it is reliable and easy of use.

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General Hydroponics pH Up

Starting at: $20.00

This Base solution is formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level. This powder based formula is made to raise the pH in a reservoir. Lightweight in comparison to liquids. Please note that this item must be shipped via FedEx Ground. This item cannot be sent to Alaska, Hawaii, Puerto Rico, Virgin Islands or Internationally. Learn More

General Hydroponics pH Down

Starting at: $20.00

The Acid formulation uses food grade Phosphoric acid to lower the pH to the proper level. This powdered acid formula is easy to handle and ship. Lightweight in comparison to liquids. Widely recognized as a consistent and reliable product. Please note that this item must be shipped via FedEx Ground. This item cannot be sent to Alaska, Hawaii, Puerto Rico, Virgin Islands or Internationally. Learn More

Hanna 1500 PPM Calibration Solution - 500 ml

$21.45

TDS solution are produced with high-quality potassium chloride in various concentrations. They are standardized using a conductivity meter calibrated with NIST potassium chloride. HANNA is one of the few producers to offer calibration solutions for lab and field applications with packages from 20 to 500 mL. Our packaging has been designed to keep air and light from damaging the calibration solutions. Learn More

General Hydroponics pH Control Kit

$21.45

Contains: 8 oz. pH UP 8 oz. pH DOWN 1 oz. indicator & vial Please note that this item must be shipped via FedEx Ground. This item cannot be sent to Alaska, Hawaii, Puerto Rico, Virgin Islands or Internationally. Learn More

Hanna pH 4.01, pH 7.01, 1500 PPM, 1413 uS Solutions

Starting at: $21.45

HANNA® buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards. Learn More

Bluelab Probe Care Kit pH & Conductivity

$22.85

Everything you need to clean, hydrate and calibrate pH probes as well as clean and test conductivity (ppm/EC) probes. The instrument is only as accurate as the probe is clean. Accurate readings simplify crop management and provide improved growth. Probe cleaning and correctly storing pH probes ensures you get the most accurate readings possible and will maximize the life of a probe. The probe surface is where the instrument takes the reading of the solution or soil/media. If the probe face is dirty or contaminated, the readings may be inaccurate. Much like the windshield of a car, if it’s dirty you can’t see out! If the probe face is dirty, it cannot read the solution or soil accurately. Learn More

Hanna Solution Starter Kit - pH & Cleaning

$23.75

Single-dose sachets are quick and easy to use. Each sealed, light tight sachets holds just the right amount of solution. Every time your instrument is calibrated using these HANNA sachets, it is using a newly-opened bottle of solution. This convenient starter kit includes the cleaning and calibration solutions that will give you the most out of your meter, saving you money on replacement probes. Learn More

Hanna Solution Starter Kit - pH & TDS

$23.75

Single-dose sachets are quick and easy to use. Each sealed, light tight sachets holds just the right amount of solution. Every time your instrument is calibrated using these HANNA sachets, it is using a newly-opened bottle of solution. This convenient starter kit includes the cleaning and calibration solutions that will give you the most out of your meter, saving you money on replacement probes. Learn More

Bluelab Meter Carry Case

$25.50

Bluelab is excited to introduce a new accessory which makes transporting and using their Meters even easier! The Bluelab Carry Case provides a custom fit so you can use and read your Bluelab Meter right from the carry case. A firm outer casing offers impact reduction for your Meter. There are two pockets in the top of the case especially made for meter probes. The internal strap is a tidy way to tuck away the probe cables. Removable and adjustable straps provide even more comfort and convenience. The strap can be hung on the wall or used over your shoulder, keeping the Meter safe and dry in the carry case so only the probes go into the nutrient container. In-between use, we recommend placing dry probes into the pockets. Simply zip the Carry Case to close it, then tuck away safely for storage or transport. Learn More

Advanced Nutrients pH Up

Starting at: $27.00

Acidity versus alkalinity are key factors in your crop's water and root zone, as measured by pH. If you have too high or too low pH, your crops cannot uptake nutrients, and may well be damaged or even killed. That's why smart growers daily monitor and adjust optimum pH levels for hydroponics, sphagnum moss, coco coir, rockwool, aeroponics, soil, and other types of plant growth media. Some companies make cheap, inferior pH adjustment products that never achieve consistent results; some of those products contain harmful materials. Advanced Nutrients pH products are carefully-manufactured pure concentrates that are pharmaceutical grade. Please note that this item must be shipped via FedEx Ground. This item cannot be sent to Alaska, Hawaii, Puerto Rico, Virgin Islands or Internationally. Learn More

Advanced Nutrients pH Down

Starting at: $27.00

Acidity versus alkalinity are key factors in your crop's water and root zone, as measured by pH. If you have too high or too low pH, your crops cannot uptake nutrients, and may well be damaged or even killed. That's why smart growers daily monitor and adjust optimum pH levels for hydroponics, sphagnum moss, coco coir, rockwool, aeroponics, soil, and other types of plant growth media. Some companies make cheap, inferior pH adjustment products that never achieve consistent results; some of those products contain harmful materials. Advanced Nutrients pH products are carefully-manufactured pure concentrates that are pharmaceutical grade. Please note that this item must be shipped via FedEx Ground. This item cannot be sent to Alaska, Hawaii, Puerto Rico, Virgin Islands or Internationally. Learn More

HM Digital COM-100 EC/TDS/Temp Meter

Starting at: $31.85

Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature. Three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor. Automatic Temperature Compensation (ATC) using three temperature coefficients. Waterproof housing. Measurement Range: 0-9990 µS; 0-8560 ppm (auto-ranging). Digital Calibration (push button). Auto-off function, data-hold function and low-battery indicator. Display: large and easy-to-read LCD screen includes simultaneous temperature reading. Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution. The meter can be recalibrate with digital calibration using the push buttons, rather than a screwdriver. Includes a cap, batteries and lanyard. Learn More

Hanna Primo TDS Tester

$34.75

The Primo TDS tester provides a fast and dependable way to measure the Total Dissolved Solids in your water samples. It is ideally suited for the rigorous demands of water quality professionals, who will appreciate the practicality of Primo's easy-to-read LCD when demonstrating the before and after results of conditioning and filtration systems. Temperature is compensated automatically to ensure the readings are consistent to the standard or reference temperature. Learn More

PH Maintenence