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			#11  
			
			
			
			
			
		 
		
		
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			 I have 2L of Siporax in my sump.  I only have 28 lbs of live rock in my tank because I used branch rock, so I think the Siporax helps in my case.  I'm not sure it is even beneficial in many cases. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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