Filters

Is this for a reef tank or for a fish only. For a reef tank I would recommend a hang on refugium, or one under the tank feed by an overflow so that you can put your skimmer and heaters down under the display. For a fowler, Magnum350's work fairly well as long as you keep up with cleaning the filters and replacing carbon. Even with a fowler a sump/refugium works great and is easier to take care of. IMO
Rich

or you could use all three. like me, i have hob fuge a canister and a berlin style sump