CLR Septic System Treatment is partnered with the EPA's Safer Choice Program (formerly Design for the Environment (DfE)), recognizing the product as a safer alternative to chemicals. With 3 treatments for systems up to 1500 gallons, it works instantly, can be used any time of day, and its patented stabilization process allows for live, active bacteria to be deposited into the septic tank. Unlike competitors' products, CLR Septic System Treatment's innovative formula does not contain detergents, preservatives, or inert "carriers" that the bacteria attach to in use. CLR Septic System Treatment can be poured down any drain, as opposed to dry septic system treatments that can only be flushed down toilets.