Do it Calcium, Lime, And Rust Remover Plus. Industrial strength cleaner removes tough stains. Instantly removes calcium deposits from glassware, decanters, tea, and coffee pots. Removes lime scales from coffeemakers, humidifiers, tubs, toilets, and sinks. Removes rust stains from cement, stucco, porcelain, chrome, and metals. 32 fl. oz. (This product is comparable to CLR cleaner).