Very nice build. Give me a kick in arse to get mine done 
 
I agree with Laurie. If you can find some live rubble even to put in sump would be benifical.  
 
I too used dry rock but filled sump with live and used water from other tank to fill current one 
 
I prefer to find some from another reefer rather than lfs. Chances of bad hitch hikers would be greatly reduced 
		
	
		
		
		
		
		
	
		
		
	
	
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