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					Originally Posted by Diomedes
					
				 I would consider adding a small Diadema urchin to your small display.  They are at King Ed's right now and are harsh grazers of a wide variety of Algae.  They are also very agile.
 Cheers,
 Stephen
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 Thanks, Stephen.  Diadema are the long spined black urchins aren't they?  Would you recommend them over a Tuxedo or other type?