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					Originally Posted by  pnoon
					 
				 
				If what you see are in "patches", it is more likely mold. Plume, for the most part, will be evenly distributed. 
			
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 QFT - and upon close inspection, mold will appear fuzzy while plume looks more crystalline.  Plume is a direct result of the migration of oils to the surface and is unlikely to occur in patches.