Some probably get by without Photoflo. That may depend on the characteristics of your local water supply. I had not heard that the choice of fixer makes any difference. Usually the last solution to hit your film will be a washing aid, to shorten washing time. Several minutes of water wash usually follow. The Photoflo is just a surfactant to help water drain off without leaving spots. If you use Photoflo, be aware that you can probably get by with a much more dilute solution than Kodak recommends; a drop or two in a tank with one 35mm reel should generally be enough.