Effective way of maintaining clean dental-unit waterlines. Place tablet in an empty dental-unit water bottle every time you refill the water. Designed for continuous treatment of lines. Odorless and leaves water tasteless. Contains a low-level concentration of nontoxic ingredients that are safe enough for patient contact, bonding, and dental-unit equipment. Remains effective for up to 28 days. EPA registered to provide less than or equal to 10 CFU/mL.