[APD] Calcium Carbonate to keep healthy shells

[Sam Zaydel <szaydel at pacbell_net>]

Has anydoby experimented much with how much Calcium Carbonate needs to 
be added to water to keep strong good looking shells on Snails? I 
realize of course that water is different, but approximatley what 
parameters should the water be at?

Thanks Ya'All.

S.

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