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Glossary of Terms

Bromine

Chemical sanitizer that kills bacteria and algae.

Buffer

Chemical that resists pH change, e.g. sodium bicarbonate

Calcium Hardness

A measure of the calcium salts dissolved in water.

Caustic Soda

Also known as sodium hydroxide and is used to raise pH.

Chloramines

A group of chlorine ammonia compounds formed when chlorine combines with organic wastes in the water. Chloramines are not effective as sanitizers and are responsible for eye and skin irritation as well as strong chlorine doors (also known as Combined Chlorine).

Chlorine

Chemical sanitizer that kills bacteria and algae.

Chlorine, Combined

The reaction product of chlorine with ammonia or other pollutants, also known as chloramines.

Chlorine Demand

Amount of chlorine required to react on various water impurities before a residual is obtained.

Chlorine, Free

Chlorine available to kill bacteria or algae. The amount of chlorine available for sanitization after the chlorine demand has been met. Also known as chlorine residual.

Conditioner

See Cyanuric Acid

Corrosion

The destruction of metal surfaces mostly due to low pH (below 7.0) and or low alkalinity. 

Cyanuric Acid

Chemical used to prevent the decomposition of chlorine by ultraviolet (UV) light.

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