Beneficial Features of the pH Filter: Increases alkalinity/pH up to 9.5 Filters made in the USA and tested both Nationally and Internationally Designed to be used with chlorinated municipal water. Not to be used with salt water. Filters up to 150 gallons Filters are easy to install Alkaline pH Filters are tested to remove up to 99.99% of the following zones of contamination: Aesthetic contaminants: Unpleasant taste, odors, cloudiness, silt and chlorine Chemical contaminants: VOC’s, toxic chemicals, trihalomethanes, PFOA, PFOS, PCB’s, glyphosate, herbicides, detergents, pesticides (DDT), benzene, atrazine and many more Inorganic contaminants: Heavy metals, aluminum, asbestos, cadmium, chromium 6, copper, arsenic, nitrates & nitrites, lead, and mercury Radiological contaminants: Radon 222