America"s most effective digester. Just a few ounces are necessary to control a septic tank or other area where digestion is necessary. Boat owners are amazed at how many days go by without the smell coming from the head. The pleasant fragrance last for days while the bacteria digest solid and liquid waste. You will not find a better product anywhere. • Safe to use in all types of septic systems • Formaldehyde free • Keeps your septic tank and drains smelling fresh longer than any other product