Specially formulated to be continuously present in your water lines and to keep lines clean. Achieving clean water is as easy as dropping an effervescing tablet into your water bottle when you refill. Each tablet is odorless, tasteless and contains a super low concentration of non-toxic ingredients that maintain your system for up to 28 days. Eliminates the cost and time of weekly shock treatments and daily water lines purging. No waste, simply use it until it's gone.