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					Originally Posted by  Buckeye Field Supply
					 
				 
				Yeow.  Someone sold you a less than ideal set of prefiltes.  Assuming you are on city water w/o chloramies, a good combo is a 1 micron sediment filter and a 0.5 micron carbon block.  GAC prefilters really have no place in the high capacity systems we use in this hobby.  Really no need for a third prefilter, but you could use a second sediment filter or a second carbon block if you'd like. 
			
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 They were included with the unit. So its not a good idea to use the ones included? So 1 micron sediment filter and two 0.5 micron carbon block? 
BFS is definitely getting some business from me!