How To Treat Swimming Pool Water?

Commonly, to treat swimming pool water, a filtration system is set up. Did you know that even if this, adapted to the needs of your swimming pool, ensures 80% of the water quality, it does not combat the proliferation in the water of pathogenic germs, viruses, algae, and other organic waste from the pool environment?

These risks of external aggression are all the greater when the water temperature is high and the pool welcomes many swimmers.

Therefore, it is important to combine good filtration with effective and regular water treatment.

But then how to treat swimming pool water? Discover our advice!

The principles of water treatment

The level of quality of your water treatment is defined by three factors:

  • The pH (potential hydrogen). It must be neutral: between 6.9 and 7.4. Below 6.9, the water will be too acidic, and above 7.4, it will be too basic.
  • The TAC, or Total Alkalimetric Title. This is the concentration of carbonates and bicarbonates in the water. This value should be between 10 and 20°f.
  • TH, or Hydrometric Title. This factor is the calcium and magnesium content, also called limestone. Below 12°f, the water is called “soft”, and above 20°f, it is called “hard”.

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To maintain these three values ​​within the recommended measurement ranges, corrective products are available in all specialist stores.

To ensure effective treatment of pool water, it is important to ensure the correct water balance. Indeed, the effectiveness of the treatment products depends on it.

Products for treating swimming pool water

Different treatment products are available to you, depending on the water and the type of problem encountered, but also on the choice of treatment when installing your swimming pool.

Chlorine 

It eliminates all viruses and bacteria brought in by swimmers or from the pool environment. It also has very good residual power, so it can be used as a preventative and curative treatment. Chlorine needs to be combined with a stabilizer, as the latter is sensitive to UV rays.

Bromine

Just like chlorine, bromine is a disinfectant, oxidant, and anti-algae, both in curative and preventive water treatment. On the other hand, its use is much more comfortable than chlorine: the skin and eyes are not irritated and it does not give off an odor. Also, it does not create a pH variation and does not need a stabilizer.

It is an ideal treatment product for spas because it resists high temperatures without problems.

Finally, it is also suitable for hard water.

The PHMB 

PHMB (PolyHexa Methylene Biguanides) hydrochloride is a non-chlorinated product in liquid form, intended for the preventive treatment of swimming pool water.

It comes in a fungicidal , bactericidal and germicidal form . In addition, it blocks the growth of bacteria in water.

Since it is not an oxidant, you will need to supplement the treatment with active oxygen. Like bromine, it is not irritating to the eyes or skin, is odorless, and is resistant to UV rays.

However, it is incompatible with chlorine, bromine, and quaternary ammoniums.

Active oxygen 

Liquid or solid, active oxygen has an immediate disinfectant action, without residual effect. It oxidizes organic impurities effectively for water treatment.

Odorless, it will not irritate and has no impact on the pH of the water. It is often used as a complementary treatment to PHMB or UV treatment as a preventative measure but can also be suitable in the event of a problem. Being compatible with chlorine and bromine, it can be used as a supplementary treatment.

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Since these products are not harmless, take precautions for their storage. A dry, ventilated place, protected from heat and sunlight, and out of reach of children will be necessary.

Finally, suddenly changing treatment is not recommended: consult a technical advisor before any modification.