I do have a bubble tip anemone that is pretty small but would have to sting the hard corals wouldn't it? 
 
and it hasn't come near the hard corals 
 
I dont' have a kit for measuring DKH. 
 
I dose with Purple Up maybe every 2-3 days. 
 
I have quite a bit of flow and two T5HO's on it and my corals had been growing quite well with all their polyps out until this sudden dissappearance. 
		
	
		
		
		
		
		
	
		
		
	
	
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