Hey guys, I am setting up a 125 gallon tank and I bought one of these and I also have a 350 Marine magnum canister filter. My question is, when I bought this CFS700 filter, I didnt see anything about replacement filter media. Have any of you guys got one of these filters and do you know where to get the filter media for them? And how often to you typically change them? I know it depends alot on the fish load and tank size, but do you actually change the media or wash it out for a while or what? I thought I might be able to use some media from a different filter like a FX5 (If I got a filter tray from one of them) and use their media in this thing. Anyway, Thanks for any help.