GLOSSARY

General features of the water of a swimming pool

Active chlorine
Active oxygen
Algae
Bacteria
Bromine
Buffer effect
Combined chlorine
DPD tablets
Flocculant
Health and safety inspection record
Inorganic chlorine
Oxidisable substances
Parasites (fungi and amoeba)
pH or potential hydrogen
PHMB
Ppm
Scale remover
Shock the water
Sodium chloride
Suspended matter
The potential hydrogen (pH)
The total alkali strength
The total hardness (TH)
Total chlorine
Viruses

Active chlorine

This is the chlorine available for disinfection; it depends on the pH. E.g.: at a pH of 7.2 the chlorine is active at 70%. At a pH of 7.8, it is now only available at 30%.

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