The Planted Tank Forum - View Single Post - High Nitrate and Algae Isses Plz Help!
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post #11 of (permalink) Old 11-17-2012, 12:48 PM
Planted Tank Obsessed
Join Date: Jul 2009
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Posts: 320
Originally Posted by Rainer View Post
What does it bind then? I've had weird NO3 readings several times since switching from test strips and had to assume it was related to buffering. Ditto for PO4.
CEC (Cation Exchange Capacity) attracts and holds positively charged particles.
AEC (Anion Exchange Capacity) attracts and holds negatively charged particles.

Clay particles almost always have a negative charge (CEC). They attract
positively charged particles. NO3 is negatively charged. So it won't be attracted.

Hey some types of soil can have AEC.
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