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Glossary of Terms

ppm

Abbreviation for parts per million.

Sanitizer

A chemical which disinfects (kills bacteria), kills algae and oxidizes organic matter.

Saturation Index

See Langelier's Index

Scale

Crust of calcium carbonate, the result of unbalanced pool water. Hard insoluble minerals deposited (usually calcium bicarbonate) which forms on pool and spa surfaces and clog filters, heaters and pumps. Scale is caused by high calcium hardness and/or high pH. The regular use of stain prevention chemicals can prevent scale.

Shock

Also known as superchlorination or break point chlorination. Ridding a pool of organic waste through oxidization by the addition of significant quantities of a sanitizer.

Soda Ash

Chemical used to raise pH and total alkalinity (sodium carbonate)

Sodium Bicarbonate

Commonly used to increase alkalinity of water and stabilize pH.

Sodium Bisulfate

Chemical used to lower pH and total alkalinity (dry acid).

Sodium Hydroxide

Also known as caustic soda, A by-product chlorine generation and often used to raise pH.

Stabilizer

See Cyanuric Acid

Superchlorination

Application of large dosages of chlorine to destroy build up of undesirable compounds in water.

Titration

A method of testing by adding a reagent of known strength to a water sample until a specific color change indicates the completion of the reaction.

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