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Old 07-30-2007, 02:36 AM   #52 (permalink)
kekon
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Default Re: How to balance NPK, Ca, Mg and micros - new experiments

As far as i know ADA substrates may contain Ca and Mg. "Power Sand" is a composition of Si (99%), Mg, Ca, Ti, Al. Because of that Ca and Mg in the water column don't have to be precisely balanced.
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