Fuji film generally required an extra 15% time in development. I use 6:45 in the Kodak kit. I could probably go a bit longer but I like to maintain saturation and prefer adding more light to bring out the shadows (I view them backlit). Also, you mention 'wash water'. You should not wash between each step. The steps are designed to *require* some contamination between steps to work properly. The only wash should be after first developer (to remove developer and stop the development process) and after the fixer stage.