If your skimmer is the Pro version, there should be a Deluxe kit you can upgrade to, which includes a surface skimmer and a media basket (for putting in your carbon cartridge).
Link:
http://www.redseafish.com/Product.as...D=34&proID=130
http://www.jlaquatics.com/cgi-bin/sh...alogno=ps-rspd
What you could also do is keep the fluval and only run carbon with it. I forgot if it's the sponge or those little beige cylinder things that cause nitrates to build up, or both. A lot of ppl use Aquaclear filters w/ carbon as well, cuz it's a lot easier to switch out the carbon cartridge compared to the fluval.