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					Originally Posted by mooch28
					
				 
				some liquid vitamen and foods for inverts. 
			
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 What liquid food and vitamens?  You probably don't need to add any liquid food at all - even DT's can pollute your tank and right now it seems you are having problems so I would discontinue for a time.
While you are checking out the "clean freak" also check to see if anyone has been using insecticide anywhere around the tank or even in the house.  I know I had this problem a couple of years ago and caught my son with the Raid can!