My biggest eureka moment was learning that I could combine a ROAMfilter Plus 2 to collect large amounts of water quickly and quietly in the wild (filtering it as a first pass), and then lug it home to pass through a Berkey fot a second pass.
That same setup can be used with my potable water to remove the chlorine dioxide before remineralizing.
These also pack easy and can go with you with some jerry cans in a bug out situation.
Powerful and flexible.