Propur Slimline water filters are specially made for emergency preparedness and are ideal for use with most water sources including lakes, rivers, streams, ponds, rain and tap water. The new ProOne G2.0 All in One CONTAMINANTS & FLUORIDE GRAVITY WATER FILTER combines silver infused white ceramic with new ProSorb granular activated carbon based media. In addition to primary contaminants, only the ProOne G2.0 water filter element helps reduce or remove heavy metals, fluoride, pesticides, herbicides, chloramines, bacteria, pharmaceuticals and more. The ProOne G2.0 filter is easy to install, use and clean - no priming required and no additional add-on filters necessary to remove fluoride. The ProOne G2.0 ALL-IN-ONE CONTAMINANTS & FLUORIDE GRAVITY WATER FILTER has been tested to meet NSF/ANSI standards 42 & 53 and NSF Protocol P231. The ProOne G2.0 filter is available in 4 sizes to fit all Propur systems and most other brands of gravity systems. Choose the most advanced gravity water filter, choose the ProOne G2.0 by Propur.