CLR septic treatment and drain care developed in conjunction with the EPA and carries the EPA symbol of approval. It is safe for the environment and works to prevent and reduce sludge build-up. Does not contain any soaps, enzymes, or other emulsifying ingredients. The active bacteria formula can be poured into any drain, any time and begins to work at once on fats, oils, grease, and other stubborn organic matter. Use once a month to keep drains and septic systems flowing freely. Bottle contains 3 septic treatments.