Thank for the detail reply.
Traveling Distance: I mean that when you have more baffle the water need to travel up and down more. Suppose to pass one baffle the water needs to travel one foot, going down and than up. So if there is one more baffle water need travel another foot.
Many years back when I was setting up my system, Iread somewhere that when water travel more up and down, it provide efficient filtration and Crystal water without any sock or sponge. And the example was compared with the natural streams.