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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.


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

Delonghi DD30P AriaDry Pump Dehumidifier 30L Hygrometer & Thermometer  GENUINE picture
Delonghi DD30P AriaDry Pump Dehumidifier 30L Hygrometer & Thermometer GENUINE
$945.0

New Howard Miller Olympia 612-721 Thermometer Barometer Hygrometer picture
New Howard Miller Olympia 612-721 Thermometer Barometer Hygrometer
$723.1

Cigar Humidor Humidifier Hygrometer Glass Display Cooling Storage Steel Modern picture
Cigar Humidor Humidifier Hygrometer Glass Display Cooling Storage Steel Modern
$538.05

Electric Stainless Steel Cigar Cooler Humidor Hygrometer Storage drawer Fridge picture
Electric Stainless Steel Cigar Cooler Humidor Hygrometer Storage drawer Fridge
$451.73

Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer picture
Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer
$359.49

DELMHORST INSTRUMENT HT-3000 Hygrometer picture
DELMHORST INSTRUMENT HT-3000 Hygrometer
$328.0

Michell Instruments Easidew Portable Hygrometer picture
Michell Instruments Easidew Portable Hygrometer
$300.0

Springfield Vertical Thermometer and Hygrometer (9.125-Inch) 1 picture
Springfield Vertical Thermometer and Hygrometer (9.125-Inch) 1
$299.99

Comfort Minder Black & Nickel Hygrometer [ID 1624011] picture
Comfort Minder Black & Nickel Hygrometer [ID 1624011]
$277.95

General Tools RHMG650 9-In-1 Thermo-Hygrometer with Pin/Pinless Moisture Meter picture
General Tools RHMG650 9-In-1 Thermo-Hygrometer with Pin/Pinless Moisture Meter
$274.71

General Tools & Instruments RHMG650 9-In-1 Thermo-Hygrometer with Pin/Pinless picture
General Tools & Instruments RHMG650 9-In-1 Thermo-Hygrometer with Pin/Pinless
$269.23

New Bey Berk Clock, Tide Clock, Therm & Hygrometer On Mahogany Porthole picture
New Bey Berk Clock, Tide Clock, Therm & Hygrometer On Mahogany Porthole
$265.5

General Tools & Instruments RHMG650 9-In-1 Thermo-Hygrometer with Pin/Pinless picture
General Tools & Instruments RHMG650 9-In-1 Thermo-Hygrometer with Pin/Pinless
$262.5

Comfortminder Hygrometer/Thermometer in Brass [ID 1624007] picture
Comfortminder Hygrometer/Thermometer in Brass [ID 1624007]
$253.12

Comfortminder Hygrometer - Brass & Black [ID 1624008] picture
Comfortminder Hygrometer - Brass & Black [ID 1624008]
$253.09

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