The present embodiments provide methods and apparatuses for use in
enhancing and/or treating fluids, such as fuels. Some embodiments provide
apparatuses for use in treating fuel that comprise a first conduit having
an input end, an output end, and a metallic interior surface; a second
conduit positioned within and axially aligned with the first conduit, the
second conduit having input and output ends, and a plurality of apertures
distributed along a length of the second conduit; and an impeller
assembly comprising an impeller positioned between an adaptor sleeve and
shaft support where at least the impeller and shaft support are fixed
within the second conduit, and the adaptor sleeve is positioned at the
input end of the second conduit.