And you're adding rock to this tank?  
 
Honestly, I think you'll not be happy with this. It will take away from the natural look of the tank, and unless you're doing a 10k ft deep tank theme, not even applicable to a reef. 
Maybe get that made up in a sticker and he can put it on his car... 
		
	
		
		
		
		
			
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				Brad
			 
		
		
		
		
	
		
		
	
	
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