A chemical agent widely used for sanitising and purifying water, chlorine is available in various forms:
- Chlorine tablets: these large, slow-dissolving tablets are placed in the skimmers, in floating dispensers or in contact dosing devices;
- Chlorine granules: dichlor (sodium dichloroisocyanurate) is a fast-dissolving product, particularly indicated for rapid chlorination and hyperchlorination;
- Liquid chlorine: a product with high stability to photolysis and evaporation; it requires an automatic dosing system.
Another disinfectant traditionally used for the treatment of pool waters, bromine is used exclusively for slow and maintenance chlorination. It comes in slow-dissolving tablets which must be dispensed through a contact dosing device.
- Active oxygen
A valid alternative to water treatment with chlorine or halogens, products, oxygen may be placed in the pool in tablets or granules, or in liquid form (i.e. using oxygenated water products, which must be dispensed by a dosing pump). Associated with a UV treatment system, active oxygen ensures natural disinfection of the pool, without the use of chemicals.
- Ozone-based treatment
One of the most innovative and effective pool disinfection methods, ozone treatment has high oxidation power and is rapid-acting against bacteria, algae and fungi, ensuring excellent water sanitisation.