I have one baffle in my sump but only cause I'm too lazy to take it out.  No micro bubble issues and my skimmer doesn't introduce bubbles.  My auto top-off is manual at the moment but I'm planning on running a float valve in the sump backed up by a electric valve connected to a timer through my APEX. 
		
	
		
		
		
		
			
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				Robb
			 
		
		
		
		
	
		
		
	
	
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