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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.


Fluke 1621A-H-156 KIT, THERMO-HYGROMETER, DEWK, HIGH ACCURACY picture
Fluke 1621A-H-156 KIT, THERMO-HYGROMETER, DEWK, HIGH ACCURACY
$4310.0

Fluke 1621A-S-156 KIT, THERMO-HYGROMETER, DEWK, STANDARD picture
Fluke 1621A-S-156 KIT, THERMO-HYGROMETER, DEWK, STANDARD
$3595.0

Fluke 1620A-H-156 THERMO-HYGROMETER, DEWK, HIGH ACCURACY picture
Fluke 1620A-H-156 THERMO-HYGROMETER, DEWK, HIGH ACCURACY
$2925.0

Fluke 1620A-S-156 THERMO-HYGROMETER, DEWK, STANDARD picture
Fluke 1620A-S-156 THERMO-HYGROMETER, DEWK, STANDARD
$2560.0

Fluke 1620A-BASE-156 BASE, THERMO-HYGROMETER, DEWK picture
Fluke 1620A-BASE-156 BASE, THERMO-HYGROMETER, DEWK
$1910.0

Fluke 2627-H KIT, THERMO-HYGROMETER SPARE PROBE, 1620-H picture
Fluke 2627-H KIT, THERMO-HYGROMETER SPARE PROBE, 1620-H
$1190.0

Fluke 2626-H PROBE, THERMO-HYGROMETER SPARE, 1620-H picture
Fluke 2626-H PROBE, THERMO-HYGROMETER SPARE, 1620-H
$1155.0

Bekith Silent Non-ticking Metal Wall Clock with Thermometer and Hygrometer Me... picture
Bekith Silent Non-ticking Metal Wall Clock with Thermometer and Hygrometer Me...
$877.69

Howard Miller 612-721 Olympia - Large Weather Station - Barometer & Hygrometer picture
Howard Miller 612-721 Olympia - Large Weather Station - Barometer & Hygrometer
$799.0

16''x16''x48'' Grow Tent + Digital Hygrometer +Shears+Timer +Trellis Net +Hanges picture
16''x16''x48'' Grow Tent + Digital Hygrometer +Shears+Timer +Trellis Net +Hanges
$755.07

Fluke 2627-S KIT, THERMO-HYGROMETER SPARE PROBE, 1620-S picture
Fluke 2627-S KIT, THERMO-HYGROMETER SPARE PROBE, 1620-S
$700.0

Fluke 2626-S PROBE, THERMO-HYGROMETER SPARE, 1620-S picture
Fluke 2626-S PROBE, THERMO-HYGROMETER SPARE, 1620-S
$660.0

Bekith Silent Non-ticking Metal Wall Clock with Thermometer and Hygrometer Me... picture
Bekith Silent Non-ticking Metal Wall Clock with Thermometer and Hygrometer Me...
$613.68

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

Howard Miller 612-721 Olympia - Large Weather Station - Barometer & Hygrometer picture
Howard Miller 612-721 Olympia - Large Weather Station - Barometer & Hygrometer
$500.0

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