Maybe you could get some Sundial snails to eat the Zoas?  My Filefish also loved to eat Zoas.  Seems like a waste to scrap a bunch of rock when you could potentially clean it up.  If you're going to scrap it, I would happily take it off your hands to try to fix it up. 
		
	
		
		
		
		
			
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				~ Mindy 
 
SPS fanatic. 
			 
		
		
		
		
	
		
		
	
	
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