Fuji
BEST filters are good, i have three now, one i had from previous camper trailer and two new ones that came with my Kimberley. BEST stands for Bacteria Eliminating Silver Treatment, they are easily back flushed and dont require any special storage.
The first one i used was for treating the river water from Lawn Hill Gorge river, and didnt suffer any side effects of dodgy water.
Regards
Angus.