"CapFusion" wrote in message
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"Pszemol" wrote in message
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"Chris Gentry" wrote in message
news:gSU9e.6442$WI3.995@attbi_s71...
Again - reinventing the wheel! Please quote a single salt manufacturers
mixing instructions advocating adding buffers first and then mixing
salt...

Actually there are some salt mixes that are designed to be
used with regular tap water. (This taken from Anthony
Calfo's book on coral propagation.)

I would be interested in which one this would be...
And how do you define tap water... There are some
places where water is "hard" and contains a lot of
calcium/magnesium salts and there are different
places where water is softer, with less TDS...

The lowest TDS from tap water that I know of is from SF. My TDS indicated
about 30 - 35 ppm or so.
Water straight from the tap well very greatly from city to city and country.

CapFusion,...

That is true. However, remember, per U.S. EPA regulations, the maximum
concentration level (MCL) for TDS in drinking water is 500 mg/L. Sea Water
contains 30,000-40,000 mg/L TDS. So the TDS of ordinary tap water isn't usually
a problem. The same cannot be said for other compounds found in tap water.