Schaeffer 285-013S Fuel Shock (1-pint)
It is a dual phase oil soluble and water soluble potent broad-spectrum biocide. Fuel Shock is designed to prevent and control bacterial and fungal growth that can occur in diesel fuels, biodiesel fuels, and home heating oils.
Fuel Shock, when used at the recommended treatment rate, can also be used to shock treat a fuel storage tank that is infested with a large population of micro-organisms. Fuel Shock will kill these micro-organisms so that they can be removed from the system.