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Water gardens, also known as aquatic gardens, backyard ponds and garden ponds, have become popular in recent years. Usually referring to a man-made feature, these gardens typically combine a pool with aquatic plants and often ornamental fish. Fixed items such as rocks, fountains, statuary, waterfalls and watercourses can be combined with the pool to add visual interest and integration with the local landscape and environment.

Often the reason for having a pond in your garden is to keep fish, often koi, though many people keep goldfish. Both are hardy, colorful fish which require no special heating, provided you live in an area which does not have extremes of temperature that would affect the fish. If fish are kept, pumps and filtration devices usually need to be added in order to keep enough oxygen in the water to support them. In winter, a small heater may need to be used in cold climates to keep the water from freezing solid.