Thread: Black spots in my sump..any idea what they are?
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Old 03-30-2010, 02:56 PM
newreefer_59 newreefer_59 is offline
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Default Just rubs off, but they are doxens of them through-out the sump
Could be related to the pinnacle shaped black 'sponges' that have been growing in the tank for the past six months. I pull it out of the tank regularly.
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