Do you mean you started with dead, dry rock, rather than 'live rock'? If your tank is mature, you will know because there will never be ammonia, on a normal day... ammonia signals something is wrong. 
		
	
		
		
		
		
			
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				Calvin 
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Planning a 29 gallon mixed reef...
			 
		
		
		
		
	
		
		
	
	
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