From the old datasheets for the T-Max films:
Note: To keep fixing times as short as possible, we strongly
recommend using KODAK Rapid Fixer. If you use another
fixer, such as KODAK Fixer or KODAFIX Solution, fix for
5 to 10 minutes or twice the time it takes for the film to clear.
You can check the film for clearing after 3 minutes in
KODAK Rapid Fixer or 5 minutes in KODAK Fixer or
KODAFIX Solution.
Important: Your fixer will be exhausted more rapidly with
this film than with other films. If your negatives show a
magenta (pink) stain after fixing, your fixer may be near
exhaustion, or you may not have used a long enough time. If
the stain is slight, it will not affect image stability, negative
contrast, or printing times. You can remove a slight pink stain
with KODAK Hypo Clearing Agent. However, if the stain is
pronounced and irregular over the film surface, refix the film
in fresh fixer.
Wash for 20 to 30 minutes in running water at 70 to
85°F (21 to 29°C) with a flow rate that provides at least one
complete change of water in 5 minutes. To save time and
conserve water, use KODAK Hypo Clearing Agent
And from the corresponding datasheet for Plus-X:
FINAL STEPS 65 to 75°F (18 to 24°C).
KODAK Indicator Stop Bath 0:30 KODAK EKTAFLO Stop Bath 0:30
Fix—with frequent agitation:
KODAK Fixer 5:00 to 10:00
KODAK Rapid Fixer 2:00 to 4:00
KODAFIX Solution 2:00 to 4:00
KODAK POLYMAX T Fixer (1:3) 2:00 to 4:00
Wash: Running Water 20:00 to 30:00
—OR—
Rinse with water 0:30
KODAK Hypo Clearing Agent 1:00 to 2:00
Running water 5:00
If you do much print toning using a toning regime where further fixing is called for - e.g. sepia toning - using a hardening fixer is a good idea, because the toning process tends to soften emulsions.