To clarify my post #16 - I do a 2 X stop bath but with water only. I don't use any chemicals in the stop process. I also do a 2 X fix. I have 2 fix solutions made up A and B. I split my fix time in two halves, for example 2-3 minutes in Fix A, pour it back into the bottle, fill up cannister with Fix B and fix for another 2-3 minutes, pour fixer back into Fix bottle B. I always test my fixers with a small piece of film. It lasts ages.