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Hydroponic Hygrometer

Hydroponic System DiagramTo ensure that your plants are being fed the proper nutrients and nutrient concentrations, it is important to monitor your nutrient solution.

On a daily basis you should test the nutrient solution and record the results

  • EC (Nutrient concentrations)
  • PH (acidity / alkalinity...see Lesson 4 for more information on PH)
  • Temperature of nutrient solution
  • Daytime room temperature
  • Nighttime room temperature

It is also important to record when you replace your nutrient solution so you can easily determine when it should again be replaced.

In addition to these tests, you may also want to record the stage of plant growth, the size of your plants and any problems or significant changes.

Recording this information gives you an accurate accounting of what is happening with your plants. This data is an excellent tool for diagnosing problems, should they arise.

Advanced Nutrient Testing
Neither an EC or TDS meter can indicate precisely what nutrients make up the fertilizer solution. More complete test kits are available for this purpose. Many commercial growers test their nutrient solutions on a regular basis to ensure they are feeding exactly the mix that is intended. Regular leaf analysis is an excellent tool for determining the health of your plants. Leaf tissue samples are dried, crushed and analyzed to determine the exact nutrient content.

Most of the more complex kits will test nitrogen, potassium, phosphorous and sulfur. Commercial labs offer more precise results. In the event of a combination of nutrient deficiencies, the symptoms of one problem may mask the symptoms of another. A leaf tissue analysis may be the only way to determine what is wrong with your plants.

Listed below are some testing devices to get started with.


Xcellent Wireless Indoor/ Outdoor Thermometer and Hygrometer Sensor Black Siver picture
Xcellent Wireless Indoor/ Outdoor Thermometer and Hygrometer Sensor Black Siver
$1118.7

Nature's Garden Frog Barometer/Hygrometer Outdoor Thermometer, New picture
Nature's Garden Frog Barometer/Hygrometer Outdoor Thermometer, New
$1100.0

Innovic F17 Multifunctional 5 in 1 Car Thermometer Hygrometer Clock Calendar and picture
Innovic F17 Multifunctional 5 in 1 Car Thermometer Hygrometer Clock Calendar and
$1100.0

Timex 11.5in Indoor/Outdoor Tube Thermometer with Hygrometer Outdoor Thermometer picture
Timex 11.5in Indoor/Outdoor Tube Thermometer with Hygrometer Outdoor Thermometer
$1000.0

Airplane Weather Station with Thermometer Barometer and Hygrometer hangs or sits picture
Airplane Weather Station with Thermometer Barometer and Hygrometer hangs or sits
$1000.0

MIEO Round Digital Hygrometer Thermometer for Humidor HH654 with Clock picture
MIEO Round Digital Hygrometer Thermometer for Humidor HH654 with Clock
$900.99

Delonghi DD30P AriaDry Pump Dehumidifier 30L Hygrometer & Thermometer GENUINE picture
Delonghi DD30P AriaDry Pump Dehumidifier 30L Hygrometer & Thermometer GENUINE
$804.9

Traditional Banjo Weather Station Barometer Thermometer Hygrometer Clock Quality picture
Traditional Banjo Weather Station Barometer Thermometer Hygrometer Clock Quality
$453.0

Delmhorst HT-3000 Thermo-hygrometer picture
Delmhorst HT-3000 Thermo-hygrometer
$433.02

Bey-Berk 30cm Porthole Wall Clock,Tide Clock,Thermometer, and Hygrometer. Best P picture
Bey-Berk 30cm Porthole Wall Clock,Tide Clock,Thermometer, and Hygrometer. Best P
$426.0

New BOSCH GIS 1000C Thermo Detector Infrared Scanner Thermometer / Hygrometer picture
New BOSCH GIS 1000C Thermo Detector Infrared Scanner Thermometer / Hygrometer
$392.0

Dwyer Digital Thermo-Hygrometer, 20cm Probe Length. Shipping is Free picture
Dwyer Digital Thermo-Hygrometer, 20cm Probe Length. Shipping is Free
$390.0

Bosch GIS 1000C Thermo Detector Infrared Scanner Thermometer Hygrometer picture
Bosch GIS 1000C Thermo Detector Infrared Scanner Thermometer Hygrometer
$364.95

Bey-Berk Wall Clock with Barometer, Thermo and Hygrometer. Best Price picture
Bey-Berk Wall Clock with Barometer, Thermo and Hygrometer. Best Price
$362.0

Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer picture
Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer
$348.64

Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer picture
Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer
$341.49

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