Black spots in my sump..any idea what they are? - Canreef Aquatics Bulletin Board

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Black spots in my sump..any idea what they are?

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03-29-2010, 09:45 PM

newreefer_59 newreefer_59 is offline

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Join Date: Oct 2008

Location: Calgary

Posts: 196

Black spots in my sump..any idea what they are?

Over the past few days, have had dime size black spots all thru my sump as per pic.......are these an indication od something sinister? They appear to rub off easily.

Please advise.

Last edited by newreefer_59; 03-31-2010 at 05:30 PM.

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