fiji gold , any good?

No, I do not believe that calcium carbonate suspensions are useful additives for reef aquaria. I review such products here:

Calcium Carbonate as a Supplement
http://www.advancedaquarist.com/issues/july2002/chem.htm

These articles describes better ways to supplement calcium and alkalinity:

How to Select a Calcium and Alkalinity Supplementation Scheme
http://www.advancedaquarist.com/issues/feb2003/chem.htm

An Improved Do-it-Yourself Two-Part Calcium and Alkalinity Supplement System
http://reefkeeping.com/issues/2006-02/rhf/index.php

What Your Grandmother Never Told You About Lime
http://reefkeeping.com/issues/2005-01/rhf/index.htm
 
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