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			 If I misunderstood, and you are worried about overflowing of total system volume during power off, I'd go with a bigger return area as that's where all the extra water is going to end up 
		
	
		
		
		
		
			
		
		
		
		
		
			Your current design only allows for about 3.6g (if it's a 12" wide tank) Last edited by gregzz4; 01-01-2013 at 04:49 AM.  |