hi ara
i've used sprint chemistry off and on for a long time. i started with it in high school, and later college and on my own ( while in high school, college & "real life").
i've drifted away from everything but the fixer, and won't switch to another because sprint can take such a high capacity of film/paper before going bad. the folks at sprint told me that if you use "hypo check" (hi-tech sal****er/brine) when it gets cloudy, the fixer is about 1/2 way spent. the nice thing ( besides ease if mixing) about using all their stuff - dev/stop/fix/fixremover is when the stop bath "indicates" it doesn't indicate just the stop is bad, but *everything* is 'spent' -- *that* is the system in the sprint system of photography.