I just have my ceramic rings in my media basket that the Emperor 280 comes with and just use cheap non-Marineland filter pads that I get on Ebay cheap. They do have carbon, but I don't pay any attention to it. I just pretend it's not there, as I'm not medicating the tank. Just another place for bacteria to build up on.
55G Filstar XP3 - 16" Fire Eel
75G Medium Planted - Filstar XP3 Low Light - Established Feb 2006