The Planted Tank Forum - View Single Post - Dosing Greg's ferts
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post #7 of (permalink) Old 03-16-2007, 11:52 PM
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Originally Posted by tazcrash69 View Post

OK, unless there is a brand I don't know about, NPK stands for Nitrogen, Phosphate and Potassium (respectively), which is found in KNO3, KH2P04, K2S04 (respectively). Those are the Macro Nutrients, after that you also need Carbon (CO2, or Flourish Excel), and MicroNutrients (CSM+B, Tropica plant nutrition) .
He's probably talking about the Seachem Nitrogen, Phosphorous, and Potassium macros.

If you use NPK you would also need trace and iron, though trace alone might have enough iron in it.
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