Apera EC calibration kit (2.77EC, 8oz.)

Apera pH probe maintenance kit

Apera pH calibration kit (pH 4/7, 8oz. each)

Bluelab® pH Probe KCl Storage Solution 120 ml

The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and maximize the life of Bluelab pH pens and pH...

Hanna 230 mL Storage Solution

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Hanna 230 mL Cleaning Solution

GroLine Cleaning Solutions GroLine Cleaning Solution is a specially formulated acid that cleans pH electrodes. Growers should avoid touching the glass on pH electrodes as doing so can damage the electrode's invisible (but extremely important) gel layer...

GroLine Quick Cal 20ml Satchet

HI50036P is a quick calibration solution for use with Hanna's GroLine pH and/or EC/TDS meters. Using the Quick Cal function found in compatible meters allows for a single point calibration for pH and/or conductivity sensors. Each sachet has the lot...

GroLine QuickCal Solution 230ml

HI5036-023 is a quick calibration solution for use with Hanna's GroLine pH and/or EC/TDS meters. Using the Quick Cal function found in compatible meters allows for a single point calibration for pH and/or conductivity sensors. Each bottle has the lot...

Bluelab 2.77EC Conductivity Solution 500 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

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 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...

GH pH Test Kit 1 oz

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 experienced growers prefer our pH Test Kit to...

GH pH Test Indicator 8 oz (Must buy 12)

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 experienced growers prefer our pH Test Kit to...

Bluelab pH Probe KCI Storage Solution 250ml

The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and maximize the life of Bluelab pH pens and pH...

Bluelab Probe Care pH & Conductivity

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...

Bluelab Probe Care Kit - pH

Everything you need to clean, hydrate and calibrate pH probes. 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...

Bluelab Nutrient Probe Care Kit Conductivity

The instrument is only as accurate as the probe is clean. Probe cleaning is one of the most important parts of owning or operating any Bluelab meter, monitor or controller. If the probe is contaminated or dirty, it affects the accuracy of the reading...