I clean mine every week... You must have a good amount of waste if it's clogging up fast.
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Not really, you really don't see particles floating around. I'm running an FX5 on my 125g with a polishing pad so it traps a lot. Also WC's with spot cleaning weekly.
I run 2 fx5s (mostly media)and two giant hydro sponges and do a 70% water change on my 180gal a week and still got to clean them. They just catch a lot of stuff. Mine are packed every time I clean them. To me yours clogging sounds normal but also says it's working.
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