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Re: Calcium source
I would suggest the following for your calcium source that would not shock
the fish that you are trying to breed:
Put a cupful of oyster shell (used for chicken grit) in your aquarium or
Buy some Plaster of Paris and mold some cubes in a plastic ice cube tray
and place one in your aquarium.
When it is gone, replace it with another, or
Place a clam shell or piece of coral in your aquarium (this is much slower
If it were my choice, I would use the plaster.