[Old Professer]

The natural algae can cause havoc on fuel tank filters when water is allowed to condense under the fuel in storage and it grows at the boundary line and then gets pumped into the fuel lines.

[Wonder Warthog]

"The natural algae can cause havoc on fuel tank filters when water is allowed to condense under the fuel in storage and it grows at the boundary line and then gets pumped into the fuel lines."

You need to read closer, "old boy". The algae under discussion are bio-engineered organisms to be used to GROW biodiesel when fed nutrients in an industrial process--they have nothing to do with "algae growing in the fuel tank".