Iron OUT the leading brand in rust stain removal presents the Iron OUT Automatic Toilet Bowl Cleaner a specially formulated product designed to effectively combat rust and hard water stains with every flush. This concentrated solution not only eliminates existing rust but also prevents the formation of new stains for an impressive duration of up to 45 days per tablet. Remarkably potent yet completely safe this formula poses no harm to toilets internal components plumbing or septic systems. For optimal results it is recommended to employ Iron OUT powder or liquid spray initially to thoroughly cleanse the toilet bowl before introducing the tablet. Simply drop in a tablet and let Iron OUT do the work for you!