Quote:
	
	
		
			
				
					Originally Posted by  banditpowdercoat
					 
				 
				Thats kinda neat making the little box like that,  but what's the purpose?  Not sure if theres any benifit to surface skimming a sump?  It's the main tank that needs the surface skimming 
			
		 | 
	
	
 I've got an overflow on the display (600gph), so yeah, that's happening ...
When I built my sump, I didn't make a skimmer chamber, and wanted to make sure that I was able to get the surface layer from the 1st chamber. 
I get a fair amount of foam forming on the surface of this chamber and wanted to target it - only way I could think of was to pull from the top.
With the water level changing with evaporation I needed a way pull without cavitating the pump and ... Voila
Plus it gave me a chance to sniff methylene chloride fumes for a day 
