Does fixer test solution identify fixer that is too old in addition to fixer that is too used? I've got some fix that has been around longer than 2 months in a less-than-full bottle. However, while I know that the test solution will tell me if it has too much silver in it to be effective, I don't know if it will tell me if its too old (too much oxidation?).(posted 8941 days ago)Thanks
ben