01/18/2007, 01:45 AM
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RC Mod
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Join Date: Mar 2002
Location: Foster City, CA, USA
Posts: 35,743
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125-200 ppm is the normal accepted range. 170 ppm is the level I target in my tanks. This article discusses all the water parameters:
http://www.reefkeeping.com/issues/2004-05/rhf/index.php
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Jonathan Bertoni
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