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					Originally Posted by  T.G
					 
				 
				Mold. Sorry. 
 
Not serious, damaging or dangerous though. Brush it off and lower your storage humidity, you might need to leave the box open for a bit and you'll be fine. 
			
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 Correct and if you are using water as opposed to beads for humidity make sure you are using distilled water as tap water will promote mold growth.