pH and Nutrient Testing

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

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

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

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.

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

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

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

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

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

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

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

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

"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

"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

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