MEAlston wrote:
I've heard that non-iodized salt can be used in fresh-water tanks in place
of sea-salt. Is this true ?? And can you tell me what the caking
ingredients are to avoid....Many Thanks ~ED

You can use table salt, pickling salt, rock salt, kosher salt, or any
other form of sodium chloride. Even iodized salt doesn't seem to be a
problem. Avoid the anticaking agent called "yellow prussate of soda".
Others are inert, but with water and UV light yellow prussate of soda
can break down into tiny amounts of cyanide. Probably not dangerous,
but why toss it in your tank when you don't have to?

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