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bertoni · 06/21/2007, 10:37 AM

mg/L is about the same as ppm, so divide by 50 for ppm CaCO3 equivalents. That's about 2.05 meq/L. The valence isn't critical; the atomic weights are what's used. This article covers a lot of units of measurement:

http://reefkeeping.com/issues/2005-08/rhf/index.php

06/21/2007, 10:37 AM	#2
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	mg/L is about the same as ppm, so divide by 50 for ppm CaCO3 equivalents. That's about 2.05 meq/L. The valence isn't critical; the atomic weights are what's used. This article covers a lot of units of measurement: http://reefkeeping.com/issues/2005-08/rhf/index.php __________________ Jonathan Bertoni