First, welcome. You don't say what type of fish or what ever creature you plan to have. What type of five foot space, how deep, how high, what level is it on, how much weight can it hold. Water weighs a LOT. Or will you need a stand. Have you visited your local pet store to see the variety of shapes to determine what you'd like? There are corner tanks (fit into a corner) hexes, oblongs, bow and many other shapes. Extra long is great for fast swimming fish such as tetras, dianos so on. So see, you must determine what types of fish you'd like then determine the tank. Personally, my dream was to have a long 9 foot tank to house a school of bali's. So, give more info so this community can add some thoughts. Best Sherry

PS. You also might wish to add the intent of your solicitation in the header as in - Fish tank ideas for a five foot space...