FROG Water Care Experts Glossary of terms

National Sanitation Foundation. A not-for-profit, non-governmental organization providing public health and safety-related information to concerned consumers around the world.

A chemical used to make chlorine or bromine harmless. Used in test kits to counteract the bleaching effect of the chlorine or bromine in order to increase the accuracy of pool water tests. Sold as chlorine and bromine neutralizer, it is used to control excessive amounts of chlorine or bromine, so the high levels will not affect swimmers.

A gas that causes algae to bloom and disables chlorine. An element that when combined with chlorine forms chloramines. Common in rainwater, cosmetics, oils, perspiration and urine. Maintaining proper chlorine levels will prevent nitrogen from becoming a problem. Superchlorination will remove nitrogen and its related compounds.