PH, EC, TDS
GH pH Down Liquid Quart (12/Cs)
$13.70
The acid formulation uses phosphoric acid to lower the pH to the proper level...
GH pH Test Indicator 8 oz
$13.98
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. Ma..
GH pH Test Kit 1 oz (24/Cs)
$9.59
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. Ma..
GH pH Up 8 oz (12/Cs)
$9.26
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...
GH pH Up Liquid Gallon (4/Cs)
$34.16
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...
GH pH Up Liquid Quart (12/Cs)
$13.70
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...
HM Digital Handheld TDS-3 Tester
$30.22
Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hold function: saves measurements for convenient reading..
HM Digital pH / TDS / EC / Temp meter
$172.94
The COM-300 is an advanced waterproof combo meter with superior accuracy. The meter measures four parameters: pH, electrical conductivity (EC), total dissolved solids (TDS) and temperature. Features i..
HM Digital pH 80 Meter
$49.29
Resolution: pH 0.1 pH, 0.0014.0 pH. Accurate to +/-0.1 pH. Hold button and auto shut-off. Automatic calibration: Auto-ranging to 4, 7 or 10 pH. Very reliable and long lasting. Low battery indicator. ..
HM Digital Water Resistant Ec/TDS Meter w/ Temperature in C/F Hydrotester (Model COM-80)
$46.44
The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics, gardening, pools, spas, aquariums, reef tanks, water ionizers, drinking water an..
HM Digital Waterproof pH Meter
$108.07
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: 014 pH with a waterproof ho..
Sure Test GroGuru Base w/ WIFI
$1,265.74
The Sure Test® GroGuru Base (Collector) is used to collect data from the various Stems (sold separately) with sensors. The Base then forwards this information to the cloud. A single Base can be used t..
Sure Test GroGuru Stem w/ 3 Sensors
$1,095.00
The sensors on the Sure Test® GroGuru Stem have been designed to provide you the info about your root zone to make your growing even more successful. These sensors measure the moisture content, electr..
Sure Test Temperature and Relative Humidity Data-Logger
$22.73
Track, plot, log and create PDFs or Excel reports with the Sure Test® Temperature and Relative Humidity Data-Logger. Easy-to-useplug and play with a USB 2.0 connector and no software or drivers neede..