T-Max (or the Delta films) for 5 minutes in used Rapid Fix may not be enough. The
Here is a modified procedure for two bath fixing.
Do a clip test with fresh fix - record the time.
Mix up enough fresh, working strength film fix to do two batches of the film at the same time. Label one fix 1, and the other fix 2.
Use the fixer in fix 1 with your film, and do a clip test at the same time. When the clip has cleared, record the time, and pour back the fixer into fix 1.
Now use the fixer in fix 2 with your film for the same length of time.
You will have well fixed film.
The clearing time will get gradually longer. When it has doubled, discard both batches of the fix in an appropriate manner. Mix anew.
Next, check whether you still have a pink hue. You might, because while fully fixing gets rid of lots of the remaining dyes, it might not have got rid of all of them, because that really isn't the main job of fixer, but instead a fortunate additional benefit.
The pink hue isn't proof that the film isn't properly fixed, but it is a clue that it might not be properly fixed, so if you haven't used a clip test or, even better, a retained silver test, then it would be best to assume the worst.
If you still have some pink hue, Hypo Clearing Agent (not "Hypo"!) or another competing wash aid also helps with that. Again, not the main purpose, but another fortunate additional benefit.
The pink hue is harmless. Incomplete fixing is hazardous.