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On Wed, 26 Jun 2013 23:27:17 -0700 (PDT), Mitch Harmatz
<
mitch....@gmail.com> wrote in rec.aquaria.freshwater.misc:
>Calcium carbonate or CaCO3, is a raw material which abounds plentifully in nature. Plants and animals absorb calcium carbonate through water, after which it is used to build their shells and skeletons. [...]
Instead of posting some well-known trivia about calcium carbonate it
would have been much more insteresting if you had provided information
about how to remove it from your aquarium water. That actually would
have been informative and useful because only very few people will have
the problem of how to add calcium carbonate while many many need to
reduce the hardness of their water.
jue