I think he means an additional filter outside the tank like these
http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=fuel+filter&FVPROFIL=++&search3=Go
If kinda assumed you were running one, if not you should!
http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=fuel+filter&FVPROFIL=++&search3=Go
If kinda assumed you were running one, if not you should!