With patented, environmentally friendly bacteria enzymes safe for all plumbing, Roebic K-37-Q Septic Tank Treatment is specifically designed to restore the natural balance within septic tanks by promoting the efficient and rapid breakdown of solids, resulting in reduced sludge and scum levels, odors, clogs, and more efficient system operation. Biological activity in septic tanks is easily thrown out of balance when excessive water, harmful detergents, or other harmful chemicals enter the system. Roebic Septic Tank Treatment contains an all-natural, biodegradable formulation of exclusive Roetech aerobic spore-bearing bacteria that activates septic enzymes to process all the water, organic debris and toilet paper, and other wastes that you flush down your toilets and drains each day which can result in problems such as clogging of inlets and outlets, excessive odor, or costly and messy back-ups. The concentrated formula can treat a 500-gallon septic tank for up to 1 year. To use, simply shake well, pour entire contents into toilet, and flush twice. Repeat twice a year, or as needed. For over 50 years, Roebic has developed high quality products engineered for optimum performance, targeting specific problems and troublesome areas within the septic system. Trust Roebic, The Septic Professionals, for all your septic and drain care needs.