This Chemical compound which is supplied in both powder and granular form is commonly known as ‘stabiliser’ or ‘conditioner’.
It is used in swimming pool applications that are ‘unstable’ such as Liquid Hypochlorite (bleach) either as 14-15% or 10/11½%, Calcium Hypochlorite granules or tablets (approx 65–70%) and Lithium Hypochlorite granules (approx 40%).
All the above are part of the Halogen family of water treatment materials.
Cyanuric Acid is generally used in pools that are drained down, cleaned out at the start of the year, and refilled with new water.
Pool owners using salt water generators’ should use Cyanuric Acid to stabilise against chlorine loss.
Cyanuric Acid is added to pool water at approximately 1kg per 35m³ (2lbs per 7500 galls).
The object of this practise is to hold chlorine in pool water to safe guard against both dissipation from both heat and UV loss.
Cyanuric Acid levels should not go above 20 to 40 mgm/lt or 20-40ppm.
High levels of Cyanuric Acid will cause a problem known as ‘Chlorine lock’ and result with pool owners having to pump valuable heated water down the drain affecting the ecology , environment and bank balances.
The age of water meters is around.
Whilst the installation of water flow meters is mandatory in Europe the UK once again lacks European standards.
The UK has the worst records of the wasting of water inside the EEC.
Equally water supply organisations regularly dump effluent into water ways of the UK causing increasing problems to water sewage plants, rivers, reed beds, wild life areas, natural ponds etc.
Chlorine is not ecologically or environmentally friendly and cannot economically be recycled.
There are already concerns regarding its toxilogical suitability.
Cyanuric Acid is the base material in the manufacture of both quick dissolving stabilised Sodium Dichloroisocyanuric Acid granules (Dichlor’) and slow dissolving Trichloroisocyanuric Acid tablets and granules (Trichlor’).
Dichlor contains approx 56-58% chlorine content, Trichlor usually 90%.
These two compounds are the largest selling swimming pool sanitising materials in Europe in the domestic market place.
Dichlor is basically far safer than Trichlor which is regarded as dangerous disinfectant being a 5.1 oxidising agent.
The real problem arises with the continued use of both compounds. The level of Cyanuric Acid cannot be controlled unless frequent dumping of water is carried out.
Cyanuric Acid levels of 80mg/lt (80ppm) plus will cause ‘Chlorine lock’ and water must be dumped as a safeguard to disinfect against possible disease and infections etc.
The higher the ‘Cyanuric Acid level’ – the more you have to dump waste.
Remember high chlorine levels will burn grass, kill off plants, vegetable beds, pond life etc.
Given that Chlorine has been around for some 200 years odd perhaps it is time to look at ‘new age chemicals’.
Even Omar Khayyam’s famous graffiti words on the wall read ‘that the days of chlorine are numbered’.
Huxley’s brave new world will be full of Dodo fossils and hollow carbon footprints when the last light is turned off.
Peroxygen technology which is just as powerful, safer, more beneficial and less expensive I believe is a better sound substitute.
The company that I am consultant for believes that chlorine and in fact all other halogen materials are basically carcinogenetic and could well end up as the next ‘Asbestosis’.
Derek Acca
 
BSc FISPE