A vacuum guage on the filter side, clean fuel and a healthy tank should*prevent most issues. A fuel polishing system, unless it is capable of running while you are underway is doing more harm by removing what little lubricity is left in these new fuel blends. The reason the average fuel polishing system does not work is; the growth at the bottom of your tank remains there while at dockside. It is only once you are underway that any agitation takes place and disrupts the settled mess.
I clean tanks, and we see more issues with the new blends, both gas & diesel these days. Again, "Keep your fuel clean, and your tanks healthy".
El Sea,
1976' Thompson 44
Suite 44
St Petersburg, Fl