My 15 gallon tank seemed perfect though and my blue tang never seemed to have a problem. My yellow tang as of now doesn't seem to have any spots and the tank seems back to normal. Of course, I don't know that for sure though. 
 
So should I just leave it with the 5 fish I have now? I do have 5 snails in the tank too. 
		
	
		
		
		
		
		
	
		
		
	
	
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