The conservation technology Silvertex®-system is for the preventation and elimination of biological contaminations like germs, viruses and gear clusters. The installed system in the water tank guarantees a controlled output of biocidal acting silver ions at the circumfluent drinking water. This conservations of the drinking water is admissible as per paragraph 11 of the drinking water decree (drinkwd2001). Replaces the dosage of chemical supplements. No flavourful modifications. Combats effectively gear clusters, viruses and germs (i.e. e.coli, legionella, etc.) No line contamination (biofilm). For all tank sizes, just put it into the fresh water tank - READY!