You installed a standard toilet and now your buyer wants a high-efficiency unit that uses less water. The HydroRight Dual Flush Converter can easily solve the problem. Like a typical dual-flush, it allows users to select one button for liquids and another for solid waste. It installs in 10 minutes and does not require tank removal or tools. Cost: less than $25. MJSI. 815-741-9768. www.gomjsi.com.