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
- Store chemicals in single use, well labelled, air tight containers with the lid on firmly.
- Avoid exposing chemicals to light, air, moisture or heat.
- Do not mix different chemicals.
- Store chemicals away from food preparation area.
- Clean up any spillages immediately and dispose of them safely.
- Use clean and dry scoops for the chemicals.
- Do not store chemicals on top of each other.
- Never store Calcium hydrochlorite and Cyanurates in the same store room.
- Keep them as far apart as possible.
Handling of Chemicals
- Use respiratory protection when handling gaseous chlorine.
- Use gloves, preferably gauntlets, and eye protection when mixing batches of chemicals.
- Handle away from air draughts or where the chemical can be blown around.
- Add powders and granules slowly to water while stirring and NEVER add water to chemical.
- Always follow manufacturer’s directions strictly.
- Clean spillages immediately.
- Ensure that you have a first aid kit and eye wash handy just in case.
Spa Pool Treatment
Spa pools are more difficult to maintain, and are a higher health risk than swimming pools for the following reasons:
- The turbulence tends to remove a large quantity of dirt, skin and debris from peoples bodies.
- People will produce more sweat and release more body fluids as a result of the warm temperature.
- The warm, turbulent aerated water is an ideal breeding ground for many undesirable germs.
- Spa pools generally have a smaller water volume per bather than swimming pools, therefore any bugs or rubbish in the water will be more concentrated.
- As people's bodies are stripped of natural oils by the warm water, their skin is less protected and therefore more susceptible to infection.
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℃.