A TDS tester is critical when growing plants by hydroponics.
Hydroponic gardeners all over the world monitor nutrient levels in roughly the same way—by measuring total dissolved solids in the growing solution — but they have different preferences for the format of their test results. Growers in the U.S. often examine a simple ratio known as parts per million PPM). High concentrations of salts increase the solution’s electrical conductivity (EC).
Total dissolved solids readings help to indicate the density of solution which can help to determine when it’s time to add nutrients. Temperature can affect TDS/EC meter readings. It is important that you read your hydroponics nutrient packaging carefully to make sure feeding indications correspond with your meter.
SUGGESTED TDS LEVELS FOR HYDROPONICS
Information below provided by Sunleaves.
For great results, consult the ppm table below for assorted fruits, veggies, herbs and tropicals. Keeping your nutrient solution at the right concentration is important for maintaining optimum growth! (TDS level ranges below are listed in ppm.)
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Click here to read an article about Calibrating and Caring for Your pH Meter, from the July 2010 issue of Urban Garden Magazine. The article was written by Rob Samborn, Director of Sales & Marketing for HM Digital.
Click here to read an article about TDS and EC Meters for Hydroponics Explained, from the June 2010 issue of Maximum Yield Magazine. The article was written by Rob Samborn, Director of Sales & Marketing for HM Digital.
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Did You Know?
Different government agencies have different requirements for water quality. For example:
- The U.S. EPA sets the maximum contaminant level for TDS at 500 ppm.
- The World Health Organization (WHO) sets the maximum contaminant level for TDS at 1000 ppm.