05-12-2009, 06:42 PM
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im using a fluval and its never given me any problems. As for the design, if you set up a fluval, there's a divider that splits intake and outtake. That forces the water to go down and then back up, this causes to ti reach just as much fitler media surface as eheim filters. Fluval probably chose thier design so they can use that special valve that shuts off both itnake and outtake with one button. true its not the path of most resistance but because fluval uses that basket method, as long as you're not using the bagged carbon media and using loose media, the water will be forced to pass through all the layers.