Roebic K-37-Q-C1500 32-Ounce Septic Tank Treatment Concentrate K-37 septic tank treatment. Your septic system is hard at work processing all the water, organic debris, and other wastes that you flush down your toilets and drains each and every day Economical inefficient systems can result in problems such as clogging of inlets and outlets, excessive odor, or costly and messy back-ups. Help to prevent these problems with regular use of Roebic septic tank treatment. Use quarterly or as needed System maintenance k-37 septic tank treatment is part of our suggested system maintenance program (smp). our smp corrects commonly encountered problems and restores efficient system performance Safe: can be used for all Plumbing and systems. Biodegradable & enzyme free Performance: reduce sludge, scum levels, odors and digests paper