PREVENTS CLOGS AND BACKUPS: Roebic K-37 Septic Tank Treatment promotes the rapid breakdown of solids to reduce sludge and scum levels, resulting in reduced odors, less clogs and backups, and more efficient system operation | ENVIRONMENTALLY FRIENDLY AND BIODEGRADABLE: Safe for the environment, the all-natural biodegradable formulation contains aerobic spore-bearing bacteria resistant to soaps and detergents | SAFE FOR ALL PLUMBING: K-37 septic tank treatment works in both your septic tank and drain fields; It prevents the clogging of inlet and outlets that can lead to unpleasant odors and overflowing receptacles | PATENTED BACTERIA ENZYMES DIGESTS PAPER: Exclusive Roetech bacteria activates septic enzymes to process water, organic debris and toilet paper, and other wastes to keep your septic system running smoothly | ECONOMICAL: The concentrated, easy-to-use K-37 formula can treat a 500-gallon septic tank for up to 1 year; Simply shake well, pour entire contents into toilet, and flush twice; Repeat twice a year, or as needed