Ultrafiltration water filter is not going to eliminate dissolved solids or salts. Ultrafiltration only filters out solid particulate matter, but it does so on a microscopic level. Because it has such a fine micron reduction capacity, ultrafiltration will filter out the vast majority of contaminants like sediment, chlorine, and cysts. For people who want to retain minerals like calcium and magnesium in their water, ultrafiltration has the advantage.
Reverse Osmosis Ultrafiltration
Arsenic ✔ X
Bacteria ✔ ✔
Calcium ✔ X
Copper ✔ ✔
Cysts ✔ ✔
Fluoride ✔ X
Lead ✔ ✔
Magnesium ✔ X
Nitrates ✔ X
Pharmaceuticals ✔ ✔
Protozoa ✔ ✔
Salts ✔ X
Sulfates ✔ X
TDS ✔ X
Viruses ✔ ✔