It was a water change with water that was slightly higher salinity. I wonder if it is a bacterial bloom that let go from the sump? very unexpected. It's mostly cleared up now but I'll see if I can find some stragglers. 
		
	
		
		
		
		
			
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				I have to go out and buy more snails for my hermit crabs.
			 
		
		
		
		
	
		
		
	
	
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