Well as far as where Sean I can't help you but I would go with the return on each side of the tank..  This is going on my experience with the rolling current from side to side in my 90.  Very nice. 
		
	
		
		
		
		
			
				__________________ 
				No matter what the morrow brings, inventors keep inventing things. 
----------------------------------- 
Jonathan 
-----------------------------------
   www.cakerybakery.ca
			 
		
		
		
		
	
		
		
	
	
	 |