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View Full Version : Does any one test their water for Primary & Secondary Nutrients



Happyhen
21st May 2010, 03:47 PM
Primary nutrients:
The primary, or macro, nutrients required by plants are
Nitrogen (N), Phosphorus (P), Potassium (K).

Secondary nutrients:
Sulphur (S), Calcium (Ca), Magnesium (Ma), Chlorine (Cl - not always essential), Sodium (Na).

If so, please tell me how & when you do it??:confused:
Thank you.