I only use my fixer for film the one time. This is because I do not want silver particles sticking to the emulsion of my film. The fixer does not go to waste though, as I then use it in my Nova upright for print making. It will be used for the one printing session, about seven sheets of paper, sometimes more, sometimes less. Then, before the next printing session I will test it, and then if O.K, which it usually is, I will use it for the second printing session and then discard. If the print is for some one else, it is fresh fixer every time.
Happy New Year and see you in about twelve weeks time