Qoting from a post in R.P.D:

"The following are Grant Haist's recommendations for paper fixer capacities:

One-bath fixation: Commercial Archival

Paper:

Max. Ag conc.: 0.3 g/l 0.05 g/l
Max. sheets/gal: 30 8x10 5 8x10
Non-image Ag in paper: 0.005 mg/in^2 0

Two bath fixation: Commercial Archival

Paper:

Bath 1:Max. Ag conc.: 2 g/l 0.8 g/l
Max. sheets/gal: 200 8x10 70 8x10

Bath 2:
Max. Ag conc.: 0.3 g/l 0.05 g/l
after 200 after 70

Non-image Ag in paper: 0.005 mg/in^2 0"
(sorry if it's not very legible - it's supposed to be a table, but I couldn't do it)

So, from above, two bath fix is better - and cheaper...

An exausted fixer may clear a film - but will not really fix it from an archival viewpoint.
Just a note: Modern films, specially T grain ones, are rich in silver iodide, that exausts fixers very quickly.


Jorge O