I'm about to start using OA for the first time and have read some of the posts and advice on here - I'm happy with volumes etc, but I have two questions that searching hasn't answered:
1. What sort of container should I use for the solution? i.e. will a plastic bucket suffice or does the bath need to be metal/enameled to withstand the solution?
2. How long will a mixed solution last? Can I fill a bucket and use it over and over again?