I have bought some developing chemicals and have used it to develop some c41 film, the stuff I mixed but didn't use I put into storage, how long will it keep for, I've put it in plastic pop bottles and squeezed all the air out, also I tipped what I did use down the plug, I heard that some of the chems can be re-used, what ones are they, the kit I got is the Tetenal 1L kit for c41 film, which include colour developer, fixer and stabiliser.

Thanks in advance.