Ok pre filter. Not as good as the original 1 micro
"This filter is 10 micron filter. The ones that came from CuZn with the UC-200 were 1 micron filters. If I look around online I can find 5 micron filters, but I am unsure of their compatibility. I wish you offered the original 1 micron ones, or at most a 5 micron. I believe this will impact the longevity of my UC-200."