Reusing fixer/stop bath and storage

So say i have gallon of diluted fixer and stop bath, i use say 10oz for one roll of film, and they're still good. Should i pour them back into that 1 gallon diluted bottle or a new bottle for used fix/stopbath?

I'm trying to figure out how many bottles i need and in what sizes. such a pain..

If you have a gallon, say, of working strength stop or working dilution film strength fix, then yes pour the used stop or fax back in.

Indicator stop tells you when it's worn out. The toss the worn out batch and don't add it back in too the good stuff.

With fixer, it's a good idea to use hypo check to make sure your fix is in good shape. Several makers seem to make hypo check. When you get a cloud of precipitate, the fix is gone and should have the silver reclaimed or sequestered for environmental reasons, what remains can be tossed.

My method as well. I have half gallon bottles of film fix, stop and fix-remove which I use till they are exhausted. I find it important to test the fix before I run film.

I do the same with print chems in 1 gallon bottles.