- Chicken
- Liver
- Beef liver that has been left out on the deck in the sun until it has maggots
- Cabbage
- Yeast
- Buttermilk
- Beer
There is no scientific evidence to prove that adding any of these items is beneficial for your septic system. The best way to keep your system functioning is to keep harsh chemicals out of it and get it pumped every 3-5 years.