Swimming Pool & Spa Pool Maintenance

Chemical Storage and Handling

Care must be taken when handling pool and spa chemicals, whether they are gas liquid or solid.

Liquid chlorine, such as Sodium hypochlorite can burn clothing, skin and metals and once opened, it may deteriorate, especially in sunlight.

Solid chlorine, such as calcium hypochlorite may explode if it comes into contact with some other products. If its fumes combine with cyanuric acid in a moist atmosphere, it may instantaneously combust.

Storage of Chemicals

Handling of Chemicals

Spa Pool Treatment

Spa pools are more difficult to maintain, and are a higher health risk than swimming pools for the following reasons:


Your spa pool should have its own separate filter and cleaning system. The pump must be capable of circulating the full volume of the spa through the filter at least once every thirty minutes.

Filter the water for at least two hours every day, even if the spa has not been used and always run the filter for at least one hour after people have stopped using it.

Frequent backwashing or flushing of the filter is essential, as the debris will accumulate very quickly.


The amount of chemical required depends on the number of people using it and whether it is located indoors or outdoors. As a guide, indoor spas need to have twice as much free chemical as outdoor swimming pools.

Ensure that the water is balanced, i.e. the pH, total alkalinity and calcium hardness are in the correct levels. In doing this, the pH will fluctuate less and the chemicals will work more effectively.

Continuous dosing with chlorine, bromine or ozone is necessary, as is frequent water quality testing.

When using an ozone system, you must use chlorine or bromine with it.


Encourage the European tradition of washing thoroughly before entering the spa pool. This can be done by instructing the bathers to do this, or by displaying signs in the change rooms. Explain why it is so important. It is important that people working in and around the pool also maintain a high standard of health and hygiene.

Keep the walls of the spa and the surrounding area clean, and discourage people who are unwell from using the spa.

Dumping of Water

Provide the spa with a skimming system that will continuously take water from the surface, where most of the rubbish accumulates.

At the end of each day, depending on how many people used the pool, remove a quarter to a half of the water volume, and top it up with fresh water.

Public Spa pools should also be drained at least once a week and cleaned thoroughly, before refilling with fresh water.


Ensure that the water temperature does not exceed 40℃.