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					Originally Posted by  Aquattro
					 
				 
				I have probably 4x turn over through my sump. I carefully calculated this based on the cleanest pump I had in my box of pumps, considering clean was more likely to work. MAG12 won, minus head pressure, plumbing restrictions and sludge inside pipes, I figure 4x. Or 5. Or maybe 3.87658. Basically water falls down, water goes back up.    
			
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you just cant argue with this mans logic !