Hey this looks very much like the growth I was getting in my tank. I can't remember why it started (I'm not near my note book right now). At first I thought it was a bacteria bloom and dosing Coral Snow helped a little bit.  I tried all sorts of things. My tank was 0/0 for N/P.  I added a Tuxedo Urchin and it went to town on it.  The Urchin completely eradicated it within a few weeks.  I just removed the Urchin yesterday, and I'm hoping to plague doesn't come back. 
		
	
		
		
		
		
			
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				~ Mindy 
 
SPS fanatic. 
			 
		
		
		
		
	
		
		
	
	
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