I have a Senseo with a refillable/reusable pod. I also have an old Gaggia grinder with 20 grinding levels.
I read that for espresso I should tune the grinding to achieve 1 second per millilitre (25 seconds for 25 ml), but how do I tune the grinding for the Senseo machines? Their brewing pressure is much lower.
Of course I do not expect an absolute rule, just directions that are less vague than "according to taste".