Perma Wash -- yes. I believe if Pyro PMK developer is used Perma Wash is not recommended.
Thorough washing of film and prints is the best policy. There a several washing techniques. Generally they involve a number of complete water changes. I use a Gravity Works washer that I have had for a number of years. It automatically fills and drains.
Be stingy with the Photo Flo ... a few drops in distilled water.