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					Originally Posted by reef_raf
					
				 
				
	Quote: 
	
	
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					Originally Posted by muck
					
				 
				Looks like a type of sponge. 
			
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 Yup, I had lots of that in my old tank. Good at gluing te rock work together!!  
			
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 So it should be no problem?  Will it start moving to the top of the rocks getting in the way of my corals?