Non Chlorine Pool
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 25 lb BOTTLE Spa Pool SPACLEAR OXY NON CHLORINE SHOCK  US $6.99
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 BioGuard OXYSHEEN Non Chlorine Pool Shock – 8 lb Container US $43.99
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Swimming Pool Chlorine - A Basic Guide
Anyone who has been swimming will have heard mention of the chemical chlorine. It is probably one of the first chemical terms we become aware of as children. Even though they may not always understand what it does, young swimmers will be familiar with the smell of chlorine.
But in the swimming pool industry there are numerous different descriptions of chlorine and a range of terminology relating to its effect on maintaining the quality of swimming pool water.
As a guide, below are a few of the basic terms used to describe chlorine and its functions:
Swimming Pool Chlorine: A chemical used to oxidise and sanitise pool water.
Combined chlorine: The amount of chlorine which has attached to other organisms or molecules such as ammonia or nitrogen compounds.
Free chlorine: Active chlorine which is not combined with any other molecule and therefore is still available to react with and destroy any unwanted organic material in pool water.
Total chlorine: The sum total of free chlorine and combined chlorine in the pool water.
Chlorine enhancer: A compound which, when used together with chlorine, makes it perform better as an algaecide.
Chlorine Demand: The level of chlorine needed to oxidise bacteria, algae, chloramines, ammonia, nitrogen compounds and any other organic matter in the pool water.
Chlorine generator: An electrically powered device used to generate chlorine from a salt solution.
Residual chlorine: The amount of chlorine left in the water after the chlorine demand has been satisfied.
Chlorine neutraliser: A chemical used to deactivate chlorine.
Liquid chlorine: Sodium hypochlorite which is dangerous to handle and is usually only used in large commercial pools.
Non chlorine shock: A chemical used to oxidize materials such as micro-organisms, contaminants, or chloramines. It is used in a granular form of potassium peroxymonosulfate.
Stabilised chlorine: A group of organic compounds that contain stabiliser which protects the chlorine from the sun’s ultra-violet rays which can disintegrate it.
Super chlorination: This is the term used when up to 10 times the normal dose of chlorine is added to the water.
Chloramines: Unwanted, unhealthy, smelly compounds which form in the water when there isn’t enough free available chlorine to react with and so neutralise organic matter, ammonia and nitrogen-containing compounds. They are destroyed by the use of shock treatment or super chlorination.
Shock treatment: This is the term for the addition of a large amount of an oxidiser such as chlorine to the water to destroy all unwanted compounds and contaminants.
Breakpoint chlorination: The aim of shock treating swimming pool water is to create a high enough level of free chlorine to break apart all the molecular bonds and fully oxidise all organic matter. When this level has been reached it is said to be at breakpoint chlorination. Any further chlorine added above that level will be in the form of free available chlorine.
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