Red Sea Berlin Skimmer
			 
			 
			
		
		
		
		Des, ditto to the other two posts above. 
 
My Berlin hang-on took a full 24 hours before it started producing a foam.  It is also a skimmer I bought used that was two years old at the time but still needed that "break-in" period.  Apparently all skimmer are the same. 
 
PS.. I also run mine using a MAG 7, and before that a RIO 2500.  I would recommend that if you have the opportunity you should upgrade your pump to a higher gph pump (700-1000) as it will increase the performace of the skimmer.  Venturi-based skimmers are notorious for reducing pump output, especialy on smaller or non-pressure rated pumps.  (Although the pressure-rated Little Giant pumps are good pumps) 
		
	
		
		
		
		
		
	
		
		
	
	
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