Just a note: 
 
The top-off system Rory explains he is using is the same concept as the dosing pump Fish was using on his famous cube. Water is added to the system at approximately the same rate as evaporation occurs... and levels are adjusted whenever needed. 
 
Chris 
		
	
		
		
		
		
			
				__________________ 
				No more tanks    - Laying off the ReefCrack for awhile! 
Cheers, 
Chris
			  
		
		
		
		
	
		
		
	
	
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