nice, you should call him dozer. 
 
one problem for me though is that I was going to go with a layer of siliconed substrate and a token amount of crushed coral.  I wonder how that would affect the burrow making process. 
 
do you always have to buy them paired or can you buy two individuals and have a reasonable chance of pairing? 
		
	
		
		
		
		
		
	
		
		
	
	
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