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			 I built a overflow on my tank 12" wide ( 300G so YMMV as to what size you do ) and about 5 or 6 inches deep on a 45 degree angle with a bulkhead right behind it ... works great and skims the surface real good 
		
	
		
		
		
		
			Here is a rough drawing of it ... http://www.canreef.com/photopost/showphoto.php?photo=80 Cheers 
				__________________ 
		
		
		
		
	
		
		
	
	
	Steve “The most important decision you make is to be in a good mood.” ― Voltaire  |