The Propur Slimline water filters specially made for emergency water filtration are ideal for use with just about any water source including lakes, rivers, streams, ponds, rain and tap water. The ProOne G2.0 SLIMLINE All-In-One Water & Fluoride filter combines a silver infused white ceramic outer shell with new AquaMetix media for removal of fluoride and other heavy metals. In addition to primary contaminants, only the ProOne G2.0 Water & Fluoride filter elements help reduce or remove pesticides, herbicides, chloramines. The ProOne G2.0 filter is easy to install, use and clean - no priming required and no additional filters necessary to remove fluoride. The new ProOne G2.0 Water & Fluoride filter elements are tested to meet NSF/ANSI standards 42 & 53 standards.