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post #4 of (permalink) Old 02-26-2013, 08:17 PM
DarkCobra
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Join Date: Jun 2004
Location: Baton Rouge, LA
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The amount of copper in CSM+B causes no problems for shrimp that I'm aware of. Microplex has 15X more copper. I'm not sure if that is enough to cause problems, but on principle I'd stick with the CSM+B.
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