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					Originally Posted by  iceman86
					 
				 
				Yes some might fade or even brown a bit but it will come back pretty quick.  
  
When I transferred tanks I ran into some problems and had my corals (90%sps) in the holding bin without light for 7 days. Nothing died but some faded, after a few weeks it all came back to where it was. 
			
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 You can kill your corals much faster with too much light than with too little. I've done 3 dark days at a time, twice a month before; my tank never looked better. Don't know why I stopped, actually. I think it was that I didn't like not seeing the tank for 3 days. Maybe 2 would have been enough...