This detergent is easy to use and delivers a blue tint to the water in the toilet bowl to give a clear indication of when you need to replace the cleaner. It's simple to keep your restrooms sanitary with this toilet bowl cleaner and your guests will certainly appreciate your attention to personal cleanliness. Kills 99.9% of bacteria. Delivers continuous cleaning action. Powerful chlorine bleaches away stains. Keeps toilet bowls continuously sanitary, stain-free and deodorized. Not harmful to septic tanks or plumbing when used as directed.