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Brew & Grow Hydroponics Gardening and Homebrewing Supplies of Chicagoland
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pH and Nutrient Testing

Home / Hydroponic & Organic Gardening / Hydroponic Systems, Equipment and Testing / pH and Nutrient Testing
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Max: $150
  • Hydroponic & Organic Gardening
    • Grow Lights, Reflectors, Ballasts and Tents
    • Hydroponic Systems, Equipment and Testing
      • Hydroponic Systems
      • Hydroponic Grow Trays
      • Hydroponic Reservoirs
      • Watering and Irrigation
      • Water Pumps
      • Air Pumps
      • pH and Nutrient Testing
      • pH Control
      • Water Purification
    • Plant Propagation and Seed Starting
    • Fertilizer and Plant Food
    • Growing Media and Soil
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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
$21.99
Bluelab Meter Bluelab Conductivity 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
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Meter Bluelab Conductivity Pen
$104.94
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
$14.99
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.
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GH pH Control Kit
$22.98
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
$94.77
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
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HM Digital Waterproof pH Pen Meter
$108.07
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
$25.74
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 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
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HM Digital Replacement Probe for pH
$46.87
HM Digital Meter HM Digital pH 80
Measures pH and Temperature
One-touch automatic digital calibration
Water resistant
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Meter HM Digital pH 80
$49.29
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
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Meter HM Digital EC/TDS HydroTester (COM-80)
$46.44
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.
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Meter Bluelab pH Pen
$126.14
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
$9.03
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
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Calibration Solution PH4 - 8 Oz
$9.03
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
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Bluelab pH 4.0 Calibration Solution 250 ml
$10.50
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
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Bluelab pH 7.0 Calibration Solution 250 ml
$10.50
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
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GH pH Up - qt
$14.39
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
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GH pH Test Kit
$9.59
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
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GH pH Down - Qt
$14.39
General Hydroponics GH pH Down - Gal
The acid formulation uses food-grade phosphoric acid to lower the pH to the proper level.
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GH pH Down - Gal
$35.87
Bluelab Bluelab Storage Solution PH Probe (KCL) 120 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
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Bluelab Storage Solution PH Probe (KCL) 120 ml
$14.70
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
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Bluelab 2.77EC Conductivity Solution 500 ml
$18.90


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Chicagoland's premier hydroponic and homebrewing supply store. Largest selection of grow lights, tents, soils, fertilizers, nutrients, grains, hops and yeast. Drop by one of our three convenient locations: Chicago, Roselle, Bolingbrook
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