It is not necessary to use additives to enhance the performance of a properly operating septic system. If bacterial activity is low, it is because disinfectants and other products are killing the bacteria. Reducing or eliminating the use of disposal of these in the system will allow the bacteria to re-establish. Some additives cause solids to become suspended in the liquids. These solids will end up in the drain field, causing significant damage. Starters, feeders and particularly cleaners are unnecessary, and may be harmful to your system.