Which corals tend to grow out of control
			 
			 
			
		
		
		
		So far I have read that green star polyps, mushrooms, and xenia can grow out of control and take over a tank, so I am inclined to avoid them.  Are there other corals that have the same habit of growing out of control? 
		
	
		
		
		
		
		
	
		
			
			
			
			
			
			
			
			
			
				
			
			
		 
		
	
	
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