Photographer's Formulary T-4. They sell it as a concentrate that you dilute for use. Formula is not available. I'm lucky, as my local store stocks it.(posted 8914 days ago)This is the only fixer I've ever gotten excited about.
Film clears in 30 seconds. No kidding. Half a minute. Unbelieveable.
Papers: recommend fixing RC for 30 sec, FB for 60 seconds. Continuous agitation.
This is an alkaline fixer. Don't use an acid stop bath with it. Just running water. Keeps the process alkaline all the way through.
Enjoy it.