How about a larger tank then ? ... something about 6' long would give the tangs some swimming room and ease the confines for the rest of the fish. 
 
Cheers 
		
	
		
		
		
		
			
				__________________ 
				Steve 
 
“The most important decision you make is to be in a good mood.”    
  ―     Voltaire
			 
		
		
		
		
	
		
		
	
	
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