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pH and Nutrient Testing

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HM Digital Meter HM Digital PH HydroTester (PH-80)

Measures pH and Temperature
One-touch automatic digital calibration
Water resistant

Meter HM Digital PH HydroTester (PH-80)

$46.50

Bluelab Meter Bluelab Truncheon Nutrient

The Bluelab Truncheon measures the nutrient strength of your solution. It is essential when growing hydroponics to KNOW what the strength of the solution is before feeding your plants AND while they are growing. It employs a highly sophisticated microproc

Meter Bluelab Truncheon Nutrient

$145.00

Bluelab Bluelab pH 7.0 Calibration Solution 250 ml

"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).Calibration Solution should be stored in a cool place out

Bluelab pH 7.0 Calibration Solution 250 ml

$8.67

General Hydroponics GH pH Down - Qt

For plants to grow their best, it's important that the nutrient pH be slightly acidic - the range of 5.5 to 6.5 is considered ideal for most crops. Our own pH Down is made with phosphoric acid. There are many pH down products on the market, but you get mo

GH pH Down - Qt

$11.73

Nectar For The Gods Nectar For The Gods Hades pH Down - Qt

This blend of organic acids lowers your nutrient solution's pH. It's our pH down. Don't worry if you over shoot the down: just add some Olympus Up and see the benefits of adding more calcium.

Nectar For The Gods Hades pH Down - Qt

$20.40

Nectar For The Gods Nectar for the Gods Olympus pH Up - Qt

One of a kind in the industry. Olympus is derived from micronized limestone designed to not only raise the pH of your nutrient solution, but also to buffer organic acids from healthy soil decomposition. The calcium in Olympus is also very effective at tyi

Nectar for the Gods Olympus pH Up - Qt

$14.28

Bluelab Bluelab pH 4.0 Calibration Solution 250 ml

"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).Calibration Solution should be stored in a cool place out

Bluelab pH 4.0 Calibration Solution 250 ml

$8.67

Advanced Nutrients Advanced pH Down 1L

Overdrive Your Plants for their Strongest FinishDuring the final weeks of bloom phase your plants need the ingredients in Overdrive to maintain flower maturation, flower growth, and overall vigor. Many growers neglect the last weeks of bloom phase, but no

Advanced pH Down 1L

$23.60

Storage Solution PH Probe (KCL) 100 ml

The perfect solution to store and hydrate all your pH measuring instruments. We know it is extremely important to care for and store pH probes correctly. pH probes are sensitive glass instruments which age through normal use. The life and performance of

Storage Solution PH Probe (KCL) 100 ml

$12.58

HM Digital HM Digital 1000 PPM TDS/EC Calibration Solution - 3 fl oz

NaCl calibration solution that comes in a lightweight HDPE plastic bottle. Sealed with a coated foam liner. For optimized calibration. Works with both ECO and PRO models.

HM Digital 1000 PPM TDS/EC Calibration Solution - 3 fl oz

$9.99

General Hydroponics GH pH Control Kit

General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial.

GH pH Control Kit

$18.74

HM Digital HM Digital Replacement Probe for pH

Measures pH and temperature. Auto-ranging three point calibration with digital fine tuning. pH buffer 4 solution is in a sponge embedded in a clear cap. Measurement range: 0-14 pH with a waterproof housing. Digital automatic calibration (one point), with

HM Digital Replacement Probe for pH

$46.87

Bluelab Meter Bluelab pH Pen

Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control.
The Bluelab pH Pen provides a compact, quick and handy way to manage the success of your crops to ensure maximum uptake of nutrients.

Meter Bluelab pH Pen

$116.00

Calibration Solution PH7 - 8 Oz

A meter is only as good as the calibration. General Hydroponics Standard Reference Solution is available in pH 4.01 (pink) and 7.01 (green). Solution should not be reused. Pour a small quantity from bottle, calibrate meter, and dispose of used solution. P

Calibration Solution PH7 - 8 Oz

$8.36

HM Digital HM Digital Waterproof pH Pen Meter

Measures pH and temperature. Auto-ranging three point calibration with digital fine tuning. pH buffer 4 solution is in a sponge embedded in a clear cap. Measurement range: 0-14 pH with a waterproof housing. Digital automatic calibration (one point), with

HM Digital Waterproof pH Pen Meter

$101.95

General Hydroponics GH pH Test Kit

Maintaining the proper pH of your fertilizer solution is critical to a crop's ability to utilize nutrients. The roll of pH Papers and General Hydroponics' pH Test Kit are inexpensive and reliable ways to test pH. For the pH paper, simply take a piece and

$8.20

Bluelab Bluelab 2.77EC Conductivity Solution 250 ml

The 2.77EC solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/ppm probe. Calibration Solution should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. They should be

Bluelab 2.77EC Conductivity Solution 250 ml

$8.99

HM Digital Meter HM Digital EC/TDS HydroTester (COM-80)

Measures electrical conductivity (EC), total dissolved solids (TDS). Excellent for nutrient testing. Four scales: EC: µS, mS; TDS: ppm, ppt

Meter HM Digital EC/TDS HydroTester (COM-80)

$43.81

Bluelab Meter Bluelab Waterproof PPM Pen

The Bluelab ppm pen measures how much food the plant has available, provide a compact, quick and handy way to manage the success of your crops to ensure they have the nutrients they need, and has been specially developed as an affordable and effective opt

Meter Bluelab Waterproof PPM Pen

$97.00

Calibration Solution PH4 - 8 Oz

A meter is only as good as the calibration. General Hydroponics Standard Reference Solution is available in pH 4.01 (pink) and 7.01 (green). Solution should not be reused. Pour a small quantity from bottle, calibrate meter, and dispose of used solution. P

Calibration Solution PH4 - 8 Oz

$8.36

General Hydroponics GH pH Up - qt

For plants to grow their best it's important that the nutrient pH be slightly acidic - the range of 5.5 to 6.5 is considered ideal for most crops. The General Hydroponics pH Up (Base) is formulated using Potassium Hydroxide and Potassium Carbonate which a

$11.73

General Hydroponics GH PH Down - Gal

The acid formulation uses food-grade phosphoric acid to lower the pH to the proper level.

GH PH Down - Gal

$29.24

Bluelab Bluelab 2.77EC Conductivity Solution 500 ml

Conductivity (measured in ppm, EC, TDS, CF) is the total soluble salts contained within a liquid solution.<br /> Pure water does not contain salts, so it has a conductivity measurement of zero. By adding soluble elements(fertilizers or other additives) to

Bluelab 2.77EC Conductivity Solution 500 ml

$11.73