It's Time to Give Your Septic a Break Use It Once a Year ... Save Hundreds on Pumping Costs, Revive Your Septic System & Help the Environment! Eliminates odor & backups Cleans & revives plugged systems, leach lines Healthy septic tank bacteria lasts over one year Save hundreds of dollars on pump-out costs Saves potential thousands on system repair Sustainable, safe, natural biological ingredients Binds and removes harmful toxins Established in 2003, DOWN JOHN™ is a revolutionary 3 part treatment for anaerobic septic systems and needs only to be added once a year. The 12 oz. kit contains 3 packs, to be flushed down the toilet into the septic tank, on 3 consecutive days. All-natural once a year septic tank additive, Safe to handle ingredients, Stops odor, Removes sludge, Clears drain field lines, Live bacteria works at maximum efficiency for over 12 months.