Roebic Labs K-67 40-oz. Bacterial Drain & Trap Cleaner, 40 OZ Bacterial Drain & Trap Cleaner, Special Bacteria-Enzyme Formula, Works Fast To Open Slow Or Sluggish Drains, Monthly Treatment In Sinks, Tubs & Showers Helps To Prevent Clogging In Traps & Drain, Safe For Use With Septic Tanks & Cesspools, Non-Caustic, Safe For Toilets, Can Be Used To Clean Garbage Disposals.