Citrisil is the only all-in-one shock and daily maintenance dental waterline tablet. Use the orange shock tablet in your lines monthly; allowing it to work overnight to kill pre-existing odor causing bacteria. Use the white or blue maintenance tablet in your bottle daily to continuously clean and maintain dental waterlines. Drop in a new maintenance tablet every time a bottle is refilled. The tablet effervesces and continually stays in the lines to prevent bacteria growth while also being safe for patients and staff.