Ultimate Star Filter® filters contain silver in the form of silver ions. These silver ions are integrated into the activated carbon itself, as well as into the filter membrane, in the form of a nanometric support.

Depending on the concentration used, silver can be bactericidal (it kills living organisms) or bacteriostatic (prevents any living organisms - bacteria, viruses - from developing on the filter).

The concentration of silver ions used in our filters is very low and allows a bacteriostatic action, which guarantees that even if your filtered water contains pathogenic living organisms, these will have no way of developing on the filter and thus risk polluting your filtered water.