You should only need one stick for the size of your tank centered. 
 
the flashes will project themselves through the tank without any trouble, bearing in mind in nature a flash seen from above when under water will have varying degrees of intensity. 
 
Regards 
Michael 
		
	
		
		
		
		
		
		
						  
				
				Last edited by Aqua-Digital; 07-17-2007 at 06:34 PM.
				
				
			
		
		
	
		
		
	
	
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