The FPPF Chemical Company Killem Biocide is the perfect solution for controlling these microorganisms in fuel oil storage tanks and other refined or partially refined oils. This biocide is designed to effectively kill bacteria and fungi, preventing the growth of these organisms and the resulting corrosion and deposits. It is easy to use and can be added directly to the fuel tank or fuel line. It is safe and will not harm the fuel system or engine components. It is also compatible with all fuel types, including gasoline, diesel and biodiesel. FleetPride is your First Click in Heavy Duty®.