To streamline workflow I place TF-4 fixed fiber prints into a water hold bath. The hold tray gets 5 or 6 water changes during a 2 hour darkroom session. At the end of the session, prints are toned in KSRT mixed 1:9 with water. I wash prints in a washaid for 10 min and finally tray wash for 30. I don't see stains on prints several years old but I'm not sure if staining could appear down the road. Is this process sound or is there a benefit to tone in selenium mixed with washaid?