Swimming pool water treatment: myths and realities

Maintaining a pool in good condition is not as complex as one might think, provided you follow certain basic rules and demystify the common misconceptions circulating on the subject.

It is necessary to empty the pool every year

FALSE : It is true that pool water must be refreshed regularly to avoid an excessive buildup of residues from chemical treatments. This could harm the water quality. However, by taking care of your equipment and following a regular cleaning routine, annually renewing one-third of the pool water is generally sufficient.

Pool filtration is not necessary

FALSE : A filtration system is crucial for maintaining water quality. It allows water to circulate and removes impurities as they settle. Chemical treatment is only a supplement, as filtration alone purifies the water by 80%, especially during heatwaves or when there are many swimmers.

Standard cleaning products can be used for the pool

FALSE: It would be wrong to think you can save money on pool maintenance products by using standard household cleaners. To ensure the durability of your equipment, water quality, and swimmer safety, products specifically designed for pool water treatment are essential. These products are formulated to maintain a balanced pH and contain fewer harmful substances, thus guaranteeing safe use. Bleach, copper sulfate, or hydrochloric acid could damage your liner or coating, disrupt the water balance, and release harmful residues.

It is possible to drink pool water if it is chlorinated

FALSE : Chlorine alone is not enough to eliminate all bacteria and microorganisms present in the pool. A chlorine treatment can take several days to eradicate certain bacteria (such as Norovirus or Cryptosporidium) and does not fight algae, for which an algaecide is needed as a supplement. Although chlorine helps disinfect the water, it is best to avoid drinking it to prevent digestive issues.

The smell of chlorine and red eyes are signs of chlorine overdose

FALSE : In reality, a strong odor or red eyes after swimming are the result of too high a concentration of chloramines, which form when chlorine reacts with ammonia from organic waste (such as sweat or urine) from swimmers. This actually means there is insufficient chlorine treatment.

Maintaining a pool requires a lot of time

TRUE/FALSE : A pool requires light but regular maintenance. With a well-configured filtration system and appropriate chemical treatments, it is possible to manage this work without spending too much time on it.

By following appropriate dosages and establishing a regular cleaning routine, whether manually or with a robot, you avoid imbalances, algae proliferation, or marks on the liner. Neglecting these elements could force you to carry out long maintenance sessions to regain clear water and a clean pool. It is estimated that pool maintenance requires about half an hour per week.

Saltwater pools do not require chlorine

FALSE : The undesirable effects sometimes encountered with chlorinated pools, particularly for people with asthma or allergies, may encourage you to choose a salt pool. However, be aware that even if salt reduces the amount of chlorine needed, it remains necessary to disinfect the water.

Chlorine can turn hair green

FALSE : In reality, it is the copper particles from algaecides that can give a green tint to fragile, blonde, or bleached hair. To prevent this problem, it is recommended to protect your hair by wearing a swim cap or using a protective product before diving into the water.

Having a pool presents dangers

TRUE/FALSE: The risk of drowning indeed exists, and it is essential to remain vigilant while swimming. However, since March 3, 2003, legislation has mandated the presence of an approved security system (alarm, barrier, or cover), which has significantly reduced accidents. Although these systems do not replace attentive supervision, they contribute to reducing risks and allow you to enjoy your pool more peacefully. Furthermore, having your own pool will help your children get used to the water from a young age and learn to swim more quickly.

A pool uses a lot of water

TRUE/FALSE: A pool does indeed require a lot of water for its initial filling, but its consumption remains moderate thereafter. By using a cover to limit evaporation, promptly repairing any leaks, and maintaining the water regularly, your annual consumption should not exceed 30m3 of water for an average-sized pool.

You can see with the naked eye if the pool water is clean

TRUE/FALSE: Of course, clear and transparent water suggests that there is no algae proliferation or high concentration of limescale. However, invisible bacteria and microorganisms can develop without you noticing. Regular tests are essential to ensure the balance of the water, its pH, as well as its chlorine, limescale, and heavy metal levels (iron, copper).