ibanezgfx said:
my current filter just left some debris (really really small though) floating around. i may just add an other one. a guy at a LFS around here has a fluval 204 for sale for like 30 bucks used i may buy and just add to it. hows that sound?
I had the same problem with my Penguin. I'm not too sure how your filter is setup, but Soulcoffr says it's the same as a Penguin without the biowheel. The way I look at it, all the filter is doing is running tank water through filter floss and activated carbon (which goes bad) repeatedly. Chemical filtration is the activated carbon, biological filtration *could* be the filter floss (or in the new penguins, the biowheel itself), and mechanical filtration is simply the filter floss, and for dirtier tanks, I don't think one layer of filter floss is enough.
I like canister filters over HOBs (especially for bigger tanks) and I think canisters do a better job with mechanical filtration (which would solve your particle problem, most likely) because you can put in course and fine pads in there, which do a much better job than a thin layer of filter floss. Most canisters come with media, but it's completly customizable. As far as the Fluvals, I've heard mixed things about them. Some people say they leak, break easily, and are kind of undurable - yet others swear by them. The Fluval 204 you mentioned, according to the specs, is only recommended for aquariums 44 gallons and under. You can get it, but you'd most likely need additional filtration, though I've never used a Fluval canister filter, so I'm not too sure whether the 204 would be enough or not, but the $30 for the used one is a pretty good deal. If you like cannister filters, you might check out the Filstar XP line (XP2/XP3 for you) or Eheims (2213/2215). Eheims tend to be more pricey than the other canister filters, but they're extremely durable and work well. Eheims are also almost completly silent, but I've heard (no pun intended) that the Filstars and Fluvals aren't very noisy at all.
Also, the '05 line of Fluvals are out, which offer some improvements over the 04's. I can't find them anywhere but eBay and a few smaller sites though.
Hopefully that helps a little bit! I know filters are rather complicated, but it's mainly about finding something with suitable filtration that you like and are happy with.