Review on Under sink filter Aquaphor DWM-102S Morion, 1/2” black/white by Stanislaw Gorka ᠌

Attached two photos, I have two filtration systems. One filter at the entrance to the apartment is 5 microns, I have already changed three pieces in six months, the photo shows the difference between the new and the old. In the second photo, the k2 and k5 modules are disassembled, the coarse filter has only slightly darkened, and the carbon filter has no plaque at all. I think it was possible not to change for another six months, since the modules are expensive 1100 and 800r and the usual main filters that I change every two months cost only 70, although the coarse filter and the main filter have the same cell of 5 microns