Hi, I have some Agfa Rodinal B&W Film Developer left over which has not been mixed up with water and is in original container. I can not see any expiry dates listed on the container or the box so I presume it should be ok to use? The stop bath and fixer I presume also will be ok as they do not seem to have an expiry date. Just wanted to confirm this as I havent done any film developing in a year or 2 and don't want to ruin my film. Thanks!