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Re: [APD] Cation Exchange Capacity

LW: "If you are dosing through the water column it doesn't make any 
difference at all that I can see, except for that marketing thing."

I've just been wondering the same thing, the collective subconscious at 
work I guess.

I have a highly filtered tank with no organics or clay in the substrate, 
water column fert dosing at high levels, high light and CO2, but no growth. 
Is CEC important at the *leaf* surface? That is, should I add some 
clay/organic material to the water just to provide CEC at the leaf surface? 
Or do the leaves of underwater plants bypass that exchange mechanism?

We recently moved and I'm *still* trying to figure out this new water.


The US map:



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