Change the saltpetre in artbeakers

[Adhara In Space]

Either make it so that instead of that there's a bunch more random chems, or instead of saltpetre just make there be a chance to have a random chem in the amount that saltpetre is now.

there are other ways to get random chemicals that dont take away from the artbeaker's niche as a source of saltpetre for chemists and botanists, as well as one or two reward chemicals for finding one. dont forget that it also has a huge reagent capacity!