Using fixer one shot is extremely wasteful. It's 45+ years since I first started processing film and I've never seen an issue with film fixing as long as it's done past the clearing time and the film has sufficient washing.
There's no risks in re-using film fixer what so ever, best archival practice would be two bath fixing but quite frankly it's unnecessary.
Ian
A problem I've experienced is that some films such as TMax 400 have a magenta appearance with nearly exhausted fixer while other films in the same process chain do completely clear. Extra washing doesn't help. But re-fixing in fresh fixer clears them.
van Huyck Photography
"Searching for the moral justification for selfishness" JK Galbraith
Bookmarks