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Unread 03/17/2009, 08:49 PM   #2
Boomer
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Join Date: Aug 2002
Location: Duluth, Minnesota
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It takes time to break in an ORP probe in seawater. Check back in a week or two. Did you check its "calibration" ? A well run reef tank will run near 400 without ozone. Most run in the lower 300's. Fresh salt mix or a new tank will run in the mid 200's.


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