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Unread 05/17/2012, 05:31 PM   #1193
Alex T.
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Join Date: Nov 2008
Location: New Jersey
Posts: 1,803
I really don't know of anything in the housing that would rust. All exposed metals are titanium to my understanding. If you run GFO, it could be the ground up particles working their way into the skimmer and lodging there over time. Why not soak it in vinegar and RO water overnight and see if that's it? The buildup could be what's causing the rubbing that you see evidence of on the impeller.

HTH


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