We have actually been discussing this internally.:scratch:
After some deliberation we found that displaying the path of water this way paints a more clear picture of how the water flows through the entire system. We added arrows a few different ways, even on the TFC membrane and it ended up getting confusing in terms of following the water through the system.
Maybe we can do a future diagram about how each stage works to remove impurities and get into more details about what actually happens inside each stage.
Thanks for the feedback here and I appreciate you checking out the diagram.