Microbes in the form of bacteria and fungus are present in all diesel fuels. If the fuel system is not treated with Bio Kleen® Diesel Fuel Biocide on a quarterly basis, microbes can grow into colonies, resulting in fuel-filter plugging and in severe cases, fuel tank corrosion and leakage. The first indication of microbial contamination in a diesel fuel system is decreased fuel-filter life. Power Service has designed a microbial clean-up procedure that is quick and cost-effective.