The Planted Tank Forum - View Single Post - Eco Complete Nutrients?
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Old 05-15-2010, 04:42 AM   #8
Diana
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http://www.caribsea.com/pages/produc...ted_aquar.html

With particle sizes measuring 1-6 mm this is too large to have significant CEC. I am not saying it really doesn't, just agreeing with Tom.

Once it starts getting some organic matter in there the combined substrate (EC + organic matter) may very well be capable of holding fertilizers.
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