I like to think of 6e mana flows/mana ebbs as being aspected by tradition, rather than to any singular tradition.
The distinction being: an ebb can apply to all traditions, or to all traditions except X... in addition to only applying to X.
Outer space: mana ebb applies to all traditions, aka universally.
A radioactive landfill: mana ebb might apply to all traditions other than Toxic.
A Hogwarts style school library: might simultaneously be a mana flow for Hermetic Tradition, and a mana ebb for all traditions of faith.
A place of worship once consecrated to one religion, now consecrated to another: could be a mana ebb of tradition of faith of the displaced religion