First off I figured I would say hi. I am a novice at aquariums but beginner with cichlids. My wife and I currently have a 55g aquarium that we want to set up as a cichlid tank. We plan on making an background out of styrofoam and one of my co workers just made one and it looks nice. We want to use sand and have a nice grade already picked out. So I am looking for what type of filteration I should use for this. We tried setting up one awhile ago with the back hanging filters and the sand was to fine and wreaked havoc upon them. So we went with a more course sand but I am still hesitant on using the back hanging filters again. Any help on this matter would be much appreciated. and thanks in advance.