Posted: Sat May 02, 2009 10:49 pm
It sounds like you've got things a bit mixed up there. The prefilter should be nearest to the top, since it only filters out the biggest junk. I've got prefilter, but I'm not happy with it. I added some coarse filtration pads under the prefilter in the top basket. The polishing pads are good on the bottom, but you may find they'll get clogged quickly.
In my FX5s I have:
Top: Prefilter + coarse filter pads
Middle: Carbon + bioballs
Bottom: Biomax
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