Does your bathroom pass the guest test?(TM) Brillo SnoBol toilet bowl cleaner removes hard water stains, mineral deposits, lime scale, and tough rust in your toilet. The thick blue liquid formula clings to the bowl and its 9.5% hydrochloric acid delivers a powerful clean. Regular toilet cleaners remove bacteria, but this goes above and beyond, removing rust and hard water rings with its proprietary hydrochloric acid formula while also being safe for septic tanks and pipes.