K-57 Septic System Cleaner is a powerful biological product which is formulated with our patented bacterial cultures. K-57 is powerful enough to act quickly in emergency situations where sluggish conditions, clogs, surface water accumulations, or back-ups have occurred.Over the last 50 years, K-57 has "seen it all" regarding septic system problems and has restored countless systems to useful working order. If your system is giving you trouble, get Roebic K-57 and get it done!