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			 I don't think it matters what you inject them with - kalk, vinegar, liquid calcium, strontium - anything that's toxic to them when injected but reef-friendly should do the trick.  I inject them when they're small and make sure I inject all the way in.  It might take two or three injections to kill them dead so they detach and can be removed from the tank.  Powerheads off, of course. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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