Continuously cleans and deodorizes toilet bowl. Kills 99.9% of bacteria. Keeps water blue for up to four months. Application: Bowl Cleaner; Applicable Material: Ceramics; Enamel; Fiberglass; Metal; Plastic; Vinyl; Dirt Types: Bacteria; Germs; Grime; Mildew; Mineral Scale; Mold; Organic Matter; Soil; Stains; Scent: Unscented.