Not sure what type of system you have? Aerobic Treatment Units (ATUs), such as Clearstream, SYBR-AER, Hydro-Action, Jet, or Norweco, are most common.
You can often find the brand:
• On the control panel or timer box label
• Printed on the air pump or motor
• On a sticker or plate on top of the access lid
Do I need chlorine?
Chlorine is required if your system discharges to the surface. If your system uses a subsurface drain field, chlorine is not needed.
If unsure, leave sections blank.