Location and size are the two most important decisions you’ll make about your water feature. By some estimates, 90% of the original water gardens sold are replaced later with larger ones. An enthusiastic pond hobbyist always finds new plants or interesting fish to add to his/her investment. As a general rule, a 180 square-foot or 11′ x 16′ pond is a good “standard” size water feature. Trace your prospective pond out on the ground with a garden hose to help you visualize what the finished size will be.