In 1956, Ringling Brothers Barnum and Bailey Circus made its last performance in a tent and since has performed only in arenas. The point? Change often improves performance. For example, at your house a new water-saving toilet is good, but how do you decide which one would be best? What should you look for and what should you test? To help you make better-informed decisions, the National Association of Home Builders recently tested 49 popular low-flow toilets for operational efficiency. They created a flush-performance index with numerical ratings for removal of solids and "clog potential." The result? While some were star performers, others didn't measure up as far as flushing goes. Want to know which did and which didn't? Check out "savingwater.org" and click on "toilet test ranking" for performance stats on all 49 models and a list of top performers under $100. It pays to check performance before you buy. For more tips, visit our Web site at onthehouse.com. And that's the On The House tip for today.