I use one of these tanks with my jobo cpp-2. The minimum amount of solution is 240ml. Also, I understood that with xtol, one needs at least 100ml stock solution per 35mm film.

Does that mean that if I develop two films at once, I can only use 240ml of stock solution, or, iow no dilution possible, or do other "rules" apply when developing more films at once?

Thanks,
Stefan.