I am currently setting up my new tank 55gal aquascaping FW tank. Currently I have been debating my filter situation. I currently have a fluval 305 but was planning on upgrading to the 404 because I noticed they were considerably cheaper on ebay. I was planning on making the purchase at the end of this week. By ive noticed in other post people talking about the Eheim series. Specifically the 2217 canister filter. I looked it up and liked what I saw with 2217 and the 2215 filter. I just wanted to know if anyone with experience with either of the filters would share advise which one they preferred.