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			#4  
			
			
			
			
			
		 
		
		
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			 with the base 4, (start, bak, food, and C.V) these all work to reduce your nutrients to near zero.  
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
	I have tried running just the zeo system with no live rock, and only a small sandbed. it worked fine, but with the addition of live rock, the system was much easier to care for. skimming is a must  |