Aquavista 100 gives any room a view.

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We're always looking for ways to bring a little life and maybe a splash of color into our living spaces. One thing sure to liven up any room is a fish tank. There are so many options to choose from--whether you select colorful fish, splashy backgrounds, or something more subdued--an aquarium definitely can show off your personality. If you don't think you have room or knowledge to set up a complicated system, consider the Aquavista 100, from Aquavista Enterprises, Menlo Park, Calif.

This tabletop aquarium has the appearance of a flat-screen monitor, but actually is a space-saving, decorative fish tank that holds 2.4 gallons of water in a self-contained, preassembled system. It's perfect for people with limited space and for novices because the kit comes equipped with a water...