REMOVES STAINS: Put less elbow grease in cleaning your bathroom toilet tank; Thanks to its strong citric acid formula, Instant Power's Toilet Tank Cleaner removes hard-water deposits and other stains in your toilet tank EFFICIENTLY CLEANS: Clean out your toilet tank with little effort; Instant Power Toilet Tank Cleaner eliminates the need for scrubbing but still effectively cleans and freshens your bathroom toilet tank PROTECTS YOUR TOILET: Don't worry about damaging your toilet tank and bowl; Our flush cleaner is safe to use but effective against stains, prolonging the life of toilet components ELIMINATES ODORS: Remove rust and hard-water stains, and other stubborn dirt while getting rid of bad odor in the toilet; Every flush leaves a clean and pleasant citrus scent SAFE ON PIPES: Our toilet tank cleaner is free from harsh chemicals, acids, or caustics, so it's safe on your toilet tank and pipes; It's also simple to use, just add the entire bottle directly into the toilet and leave it overnight