This the common pool terminology used interchangeably in the pool industry used to describe the equipment, processes, and activities associated with swimming pools. It is important for pool owners and users to be familiar with common pool terminology in order to understand and follow safety instructions, maintain their pools properly, and communicate effectively with pool professionals.

If you are ever unsure about the meaning of a pool industry term, do not hesitate to ask a pool professional. They will be happy to explain the term to you and help you understand how it relates to your pool.

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Here is a list of the most common things that are spoken about relating to the different types of aquatics serviced:

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Above-Ground Pool

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A Pool that is supported by a metal or plastic frame and is placed on the ground

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Acid Demand
 

The amount of acid required to adjust the pH.

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Algae
 

Algae in pools are microscopic aquatic organisms that can grow and multiply rapidly in warm, sunny conditions. Algae are not technically plants, but they contain chlorophyll and undergo photosynthesis, which means they use sunlight to convert carbon dioxide and water into oxygen and carbohydrates.

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Alkalinity (total)
 

Total alkalinity in pool water is a measure of the water's ability to resist changes in pH. It is caused by the presence of alkaline substances in the water, such as carbonates and bicarbonates. Total alkalinity is important for maintaining a stable pH in pool water, which is essential for swimmer comfort and safety.

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Alkaline
 

Alkaline pool water is water that has a pH level above 7.0.

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Bacteria

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Bacteria in pool water are microscopic organisms that can cause a variety of illnesses in swimmers.

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Backwash
 

A process of flushing the filter to remove dirt and debris.

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Calcium
 

Metal ions in water that form salts as calcium carbonate.

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Chemical Balancing
 

Adjusting the pH and other chemical levels in the pool water to ensure that it is safe and comfortable to swim in.

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Chlorine
 

A strong oxidizing agent used to sanitize water.

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Chlorine Available
 

Amount of chlorine available to kill bacteria.

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Chloromines
 

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The combined chlorine that has already oxidized impurities. 

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Cowboy Tub
 

A cowboy tub is a galvanized steel stock tank that is used as a soaking pool.

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Filter

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The purpose of a pool filter is to remove dirt, debris, and other contaminants from pool water. Pool filters are essential for maintaining a clean and healthy pool environment.

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Hardness

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The amount of calci8um or magnesium dissolved in water.

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Heater

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Is a device that heats pool/spa water.

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Liner

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A watertight membrane that lines the inside of an above-ground or in-ground pools. Some wooden hot tubs will come with liners. 

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Muriatic Acid

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A liquid acid used to lower pH and total alkalinity.

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pH

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A measurement of acidity or alkalinity.

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Phosphates

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Phosphates are chemical compounds that contain phosphorus. They are found in many different products, including fertilizers, detergents, and shampoos. Phosphates can also enter pool water from rain runoff, leaves, and other organic matter. Phosphates are a food source for algae. 

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Pool Pump

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A device that circulates pool water through the filter and heater.

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ppm
 

A unit of measurement - acronym for parts-per-million.

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Saltwater Pool

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Saltwater pools use a salt chlorine generator to convert salt into chlorine. The salt chlorine generator works by passing an electrical current through the salt water. This creates a chemical reaction that produces chlorine and hypochlorous acid. Hypochlorous acid is the active ingredient in chlorine that kills bacteria and algae.

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Scale
 

Minerals precipitating and adhering to plaster and tile.

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Shock

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Adding a large amount of chlorine to the pool water to kill bacteria and algae.

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Skimmer

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Typically located on the side of the pool and is connected to the pool's pump and filtration system. The skimmer works by sucking water from the surface of the pool and passing it through a basket that collects the debris. The cleaned water is then returned to the pool.

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Super Chlorinate
 

Super chlorinating your pool, also known as shocking your pool, is the process of adding a large amount of chlorine to the pool water to kill bacteria, algae, and other contaminants.

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Stabilizer
 

Also known as "Conditioner". Cyanuric acid used to protect chlorine from UV rays.