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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.


National Railway Workers' Union  D 51 Clock (with temperature & hygrometer) F63 picture
National Railway Workers' Union D 51 Clock (with temperature & hygrometer) F63
$961.99

HOWARD MILLER THERMOMETER, BROMETER, HYGROMETER 612-721 OLYMPIA picture
HOWARD MILLER THERMOMETER, BROMETER, HYGROMETER 612-721 OLYMPIA
$749.0

GE PANAMETRICS MTS5-121-10 MOISTURE TARGET SERIES 5 HYGROMETER Make an Offer! picture
GE PANAMETRICS MTS5-121-10 MOISTURE TARGET SERIES 5 HYGROMETER Make an Offer!
$599.98

Panametrics MTS5-331-10 Digital Hygrometer Series 5 Moisture Target picture
Panametrics MTS5-331-10 Digital Hygrometer Series 5 Moisture Target
$599.0

Cigar Cooler Humidor Stainless Steel Freestanding Humidity Tray Hygrometer LCD picture
Cigar Cooler Humidor Stainless Steel Freestanding Humidity Tray Hygrometer LCD
$587.12

WHYNTER 2.5 cu ft Cigar Cooler Humidor Storage Stainless Steel Analog Hygrometer picture
WHYNTER 2.5 cu ft Cigar Cooler Humidor Storage Stainless Steel Analog Hygrometer
$473.47

Cigar Cooler Humidor Stainless Steel 2.5 cu. ft.Freestanding Electric Hygrometer picture
Cigar Cooler Humidor Stainless Steel 2.5 cu. ft.Freestanding Electric Hygrometer
$473.45

Delmhorst HT-3000 Thermo-hygrometer picture
Delmhorst HT-3000 Thermo-hygrometer
$456.16

Cigar Cooler Humidor Freestanding Electric Hygrometer Stainless Steel 2.5 cu.ft picture
Cigar Cooler Humidor Freestanding Electric Hygrometer Stainless Steel 2.5 cu.ft
$450.99

Freestanding Electric Hygrometer Stainless Steel 2.5 cu.ft Cigar Cooler Humidor picture
Freestanding Electric Hygrometer Stainless Steel 2.5 cu.ft Cigar Cooler Humidor
$442.89

Seamanship Agropolese, rudder wood with Barometer Hygrometer Barigo navale picture
Seamanship Agropolese, rudder wood with Barometer Hygrometer Barigo navale
$432.78

Whynter Cigar Cooler Humidor 2.5 cu. Ft. Stainless Steel Electric Hygrometer picture
Whynter Cigar Cooler Humidor 2.5 cu. Ft. Stainless Steel Electric Hygrometer
$427.55

Grow Tent+Grow Light Hanger+Digital Hygrometer+Shears+24 Hour Timer+Trellis Net picture
Grow Tent+Grow Light Hanger+Digital Hygrometer+Shears+24 Hour Timer+Trellis Net
$418.39

Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer picture
Bosch GIS 1000C Thermo Detector Infrared Scanner Imaging Thermometer/hygrometer
$389.99

Grow Tent+Grow Light Hanger+Digital Hygrometer+Shears+24 Hour Timer+Trellis Net picture
Grow Tent+Grow Light Hanger+Digital Hygrometer+Shears+24 Hour Timer+Trellis Net
$352.0

Delmhorst HT-3000 Thermo-hygrometer picture
Delmhorst HT-3000 Thermo-hygrometer
$340.0

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