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Is calcium carbonate egg shells? If I were to use a
mortise and pestle to grind them into a powder would this work as a
source of CaCo. Secondly, adding a generic form of tums (which is what I
use now) Th CaCo does cloud the water some but settles out in a matter of
an hour or so. I've been assuming that it settles onto and into the
gravel where is slowly dissolves as well as settles into the gravel to be
used by the roots after some time. Is this accurate?