They are doing this because they are not the same species.  You can't call them a "pair" when they are not the same species.  They might as well be a Maroon Clown with a Saddleback.  You should trade one in so you have two of the same species. 
		
	
		
		
		
		
			
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				~ Mindy 
 
SPS fanatic. 
			 
		
		
		
		
	
		
		
	
	
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