desinfection traitement eau piscine ozone
ozonex closing button icon website
ozonex pool water treatment tips
swimming pool water treatment ozone

Water treatment of your pool or spa

Advice for a simple and efficient water treatment of your pool

How to test your pool water, the importance of TAC for your water, properly set your pH and disinfectant, cleaning and maintenance of your pool.

EVERYTHING ABOUT YOUR POOL

If you own a pool or a spa, it would be surprising if you didn’t know how sensitive the topic of water treatment is, and don’t let it go.

80% of the water treatment is done by mechanical filtration of your pool. Chemical treatment is essential for the balance of your pH and the disinfectant to eradicate bacteria and viruses present in the water in order to have a healthy water account for 20%. If you have a good filtration and a daily monitoring of the water balance, no need for large doses of chemicals to have clear and clear water.

woman water pool treatment filtration

icon web site parameter ideaIMPORTANT POINTS

icon web water treatment pool
web icon water analysis pool
icon web tac water pool
web icon ph water pool
web icon pool water disinfectant
icon web water filtration pool
icon web water maintenance pool
icon web water treatment pool
web icon water analysis pool
icon web tac water pool
web icon ph water pool
icon web desinfectant water pool
icon web water filtration pool
icon web water maintenance pool

icon web treatment water pool The analysis of water

Pool water testing involves measuring the various chemical parameters of your pool water to ensure that it is healthy and enjoyable to use. These parameters (simplified) include TAC, pH, chlorine level and stabilizer level (isocyanuric acid).

By regularly testing your pool water, you can detect any potential problems and act quickly to solve them before they become serious. It is not because your pool water is clear and clear that it should not be analyzed. You can carry out this analysis yourself using strips, a colorimeter with tablets (much less precise) or an electronic device (we recommend that you have an electronic photometer for a better reading of the values), or you can take a sample of your water in a clean bottle for analysis by a pool professional with a very accurate photometer.

clear clear pool water treatment

pool treatment ladder web icon The balance of water

Maintaining water balance in a pool is critical to the health and comfort of its users. Proper water balance ensures that the chemicals used to disinfect the water are effective, while an imbalance can cause skin and eye irritation, as well as corrosion problems with pool equipment. The first mistake is that even if the water is visually clear and transparent, it does not mean that everything is fine. It is therefore necessary to check its balance daily.

Several factors are fundamental and must be monitored, corrected and balanced according to several criteria (the most important):

web finger icon right direction The TAC (Full Alkalimetric Title)


web finger icon right direction The pH (hydrogen potential)


web finger icon right direction The chlorine disinfection (most commonly used)


web finger icon right direction The stabilizer (Isocyanuric acid)


Very important

When you adjust the values of the water, you must be ordered.

Start by adjusting your TAC correctly, then your pH and to finish your disinfectant (here chlorine).

water analysis pool photometer treatment

icon web treatment water pool The TAC of water

The TAC (Full Alkalimetric Title) is the measure of the amount of alkaline substances present in your pool water. These substances include carbonates, bicarbonates, hydroxides and silicates, which can affect the pH of your pool water.

The TAC helps to stabilize the pH of the water in your pool, which is called the "buffer effect". This is why it should be checked before adjusting the pH.

The ideal TAC for a pool is typically between 80 and 120 ppm (parts per million). If the TAC of your pool is too high, it can be difficult to maintain a stable pH and this can lead to corrosion of the pool equipment. If the TAC is too low, the pH of the water can fluctuate rapidly and this can cause skin and eye irritation for pool users.

How to measure and adjust the TAC?

To measure it, there are strips that we only recommend for this measure which is not of the order of ppm. Indeed, as soon as you have to obtain precise values in the order of the 10th, prefer the colorimeter with tablets (for a precise measurement, we advise you to invest in an electronic photometer, example the "SCUBA").

If the measurement is below 80 ppm put TAC+ (carbonate and baking soda). The amount of product to be added is very easy to calculate because it is linear.

Exemple:

icon web presentation water treatment You find 30 ppm and your pelvis is 50 m³.

icon web presentation water treatment The average TAC should be 100 ppm.

icon web presentation water treatment So 100-30 = 70 ppm. You have to go up 70 ppm.

icon web presentation water treatment It takes 200 g TAC+ to raise the TAC by 10 ppm for 10 m³ of water.

icon web presentation water treatment So 200 g x 7 (or 1 kg 400) will raise the 10 m³ to 100 ppm.

icon web presentation water treatment Since I have 50 m³ of water, I multiply by 5, or 1.4 kg x 5 = 7 kg.

icon web presentation water treatment Put 7 kg of TAC+ in the tank (you can pre-dilute the TAC+ in a bucket with water before putting it in your tank, in front of the discharge nozzles) in 1 time after putting the pH pump to 0 (if there is an automatic pH regulator).

icon web presentation water treatment Let your filtration run h24 for 3 days, now balance the pH in several times (if you balance the pH in one time, your TAC will fall and so on) to maintain your TAC.

Your TAC is adjusted web icon thumb blue direction

image kids swimming pool fun

icon web treatment water pool The pH of the water

What’s the pH of the water?

The pH (Hydrogen Potential) of a pool is the most important measure of your water, the further you are from the desired value and the higher the product doses for the fit (again, check your values often). A pH below 7 indicates that the water is "acidic", while a pH above 7 indicates that the water is "basic".

value pool ph water treatment

Change in water pH

You have realized that the pH of your pool keeps rising and this can be dangerous for you and your family, but what are the causes:

icon web presentation water treatment You use an electrolyser and that raises your pH dramatically.

icon web presentation water treatment The outside temperature is high.

icon web presentation water treatment You have a very large number of bathers in your pool.

icon web presentation water treatment Excessive use of chemicals, such as chlorine (see our paragraph: How to minimize chlorine in pool water).

icon web presentation water treatment Your filling water is too hard => Water hardness refers to the concentration of calcium and magnesium (limestone). It is also called Hydrotimetric Title (H.T.). The hardness of the water in your pool depends primarily on your region.

If you use chlorine for disinfection, the pH of your pool water must be between 7.0 and 7.4 ppm to be in line with your disinfectant (if you use bromine, the pH must be between 7.6 and 8.0).

Swimming should be avoided while using the pH- less product. This is a chemical that can cause health problems. Pour the liquid carefully in front of the discharge nozzles, filtration in operation.

Example:

icon web presentation water treatment You find 7.8 ppm and your pond is 50 m³.

icon web presentation water treatment You need to lower your pH to +/- 7.2 ppm (0.6 ppm above the desired value).

Solution 1

icon web presentation water treatment Dosing with pH- liquid (diluted sulfuric acid) :

web finger icon right direction On average, 200 ml will lower your pH by 0.2 ppm per 10 m³ (follow the manufacturer's instructions on the product label). You will therefore need 3 liters of liquid to lower your pH to 7.2 ppm, for a water volume of 50 m³. Our advice => avoid using the pH- product in one go, as you run the risk of violently lowering your TAC. Do it in 2 or 3 doses if the value is far from the desired set point. We recommend that you start with a small amount (about 1 liter to begin with) of product and do regular pH tests until you reach the desired pH level.

Solution 2

icon web presentation water treatment Dosage with pH- powder or granule (check manufacturer's instructions on the product label):

web table dosage ph pool

Unit => g/m³

web finger icon right direction Put 1.8 kg of pH- powder (36 g x 50 m³). As for the liquid, put it in several times in the pond (over 3 days) and check the value of your pH between each dosage, with the filtration on.

Your pH is adjusted web finger icon right direction

In order not to have any more problems for the maintenance of your pH and the approximate reading of the strips, we strongly recommend you to install an automatic pH regulator for your greater comfort and to put an end to the problems of green water and algae, especially during the strong heat of the summer.

icon web presentation water treatment Connected pH regulator for small volume (- 30m³):

See the regulator

icon web presentation water treatment Connected pH regulator that can manage most of a technical room for you:

See the regulator

icon web chlorine treatment pool The disinfection of water

To keep your pool water healthy, clear and as clean as possible, it is not enough to filter it. It must also be disinfected to prevent algae and fungi from developing. Properly disinfected pool water guarantees clear and pleasant swimming water (not to mention your TAC and pH). There are several ways to disinfect your pool water, from chlorine treatment, bromine, salt or ozone which is the only natural treatment without any consumables, each with their strong and weak points.

Disinfection of water by chlorine

The disinfection of swimming pool water by chlorine is certainly the best known and most widespread technique.

Chlorine is often used as a pebble in the skimmers of your pool. Avoid stabilized chlorine pebbles (it is better to dose the stabilizer individually), you will have trouble managing your stabilizer rate and your pool water will be quickly saturated (binding, non-ecological and non-economic).

Chlorine is often used heavily in swimming pools and superchlorinated water has harmful effects on health, especially for children.

The free chlorine dosage in your pool should be between 1.0 and 3.0 ppm (or mg/l of water).

chlorine dosage pebble pool water

Here are some tips on how to properly dose your pool safely and effectively.

icon web warning treatment pool Do not mix liquid chlorine with any other chemical.

icon web warning treatment pool Always pay attention to safety when handling liquid chlorine. Wear gloves and safety glasses to protect your hands and eyes.

icon web warning treatment pool Be careful, the chlorine measurement should not only be done on the total chlorine but also on the distribution between free chlorine (disinfectant) and combined chlorine. You need to check what types of analyses your disinfectant meter is testing for.

Chlorine dosing by pebbles or tablets

icon web chlorine treatment pool Chlorine pebbles should be placed in the skimmer, not in the pool (risk of liner discoloration).

icon web chlorine treatment pool The quantity of pebbles depends on the volume of water in your pool. Example: 1 chlorine tablet of 200 g is sufficient for a water volume of 25 m³ (follow the manufacturer's instructions on the product label).

icon web chlorine treatment pool For the tablets, 20 gr covers about 2 m³ of waterstrong> (do your math).

icon web chlorine treatment pool

icon web warning treatment pool Before renewing the chlorine pebbles in your skimmers, check the rate still present in the water with a colorimeter in order not to overdose your pool water.

Liquid chlorine or bleach dosage (37° Baumé => 9,6° chlorometric)

icon web chlorine treatment pool Liquid chlorine is mainly used with an automatic regulator in order to dose the right amount of product, but you can, with great care, use it for manual water treatment of your pool.

icon web chlorine treatment pool To disinfect your water manually with liquid chlorine (sodium hypochlorite / chlorine / bleach => it's the same), you need to do some tests to know your dosage.

icon web chlorine treatment pool Make a precise colorimeter of your chlorine rate already present in your water, add 1 liter and let the filtration pump mix the whole for about 30 mn. Redo a second colorimeter, you had 0.2 ppm at the beginning and now you find 0.4 ppm so, for your pool, 1 liter of bleach (chlorine) raises your disinfectant level by 0.2 ppm. Your consumption varies according to the water temperature, the number of people bathing in the pool, the organic matter brought by the bathers (sweat, saliva, dead skin), and the weather conditions.

icon web chlorine treatment pool We recommend bleach for disinfection because the product is not expensive to purchase (14 € only, the 20 l can).

icon web chlorine treatment pool In order not to have any more problems with the maintenance of your chlorine level and the approximate reading of the strips, we strongly recommend you to install an automatic chlorine regulator (REDOX) for your greater comfort, and to guarantee a water free of viruses, germs and bacteria, especially during the strong heat of the summer.

icon web chlorine treatment pool Connected chlorine regulator for small volumes (less than 30 m³):

See the regulator

icon web chlorine treatment pool Connected chlorine regulator that can manage most of a technical room for you:

See the regulator

How to minimize chlorine in pool water?

As we have just seen above, you can have an automatic regulator installed for the right dosage of your disinfectant according to the chosen set point, between 1.0 and 1.5 ppm (this is a correct setting for most consumers). But we can do even better, you bathe in "drinking" quality water with a constant rate of about 0.4 ppm of chlorine and without additional consumables. This economical and ecological solution is the installation of an ozonator in your technical room.

What is an ozonator?

An ozonator is a device that manufactures ozone (), it is a natural gas that uses, for its manufacture, only the oxygen present in the air (), it is the most powerful treatment for your pool. It is radically effective against germs, bacteria and viruses present in the water and passing through your filtration system, and only in the technical room (no ozone directly in the pool).

web icon right direction finger Ozonator

hand bubble water treatment pool

Shock treatment of the water

A pool shock treatment is a process used to quickly treat your pool water by adding a large amount of chemicals (chlorine, bleach) at one time. This process is often used to quickly correct high levels of bacteria or algae in the water, or to remove impurities that have made the water cloudy.

The shock treatment generally used is the addition of chlorine in large quantities. These chemicals will kill microorganisms and impurities in the water, and will help to clarify the water and make it healthier and clearer.

It is important to follow the manufacturer's instructions when using a chosen shock treatment product, and to monitor the chemical levels in the water after the product is added to ensure that the levels are safe for swimming. It is also important not to overdose chemicals, as this can damage pool equipment and make the water too chemical to use properly.

Controls

Before anything else, a check of the water values is necessary because if your water has become green and cloudy it is probably that your pH is out of the desired range.

icon web chlorine treatment pool Use a colorimeter to check the TAC, adjust it if necessary (see paragraph concerning the => TAC).

icon web chlorine treatment pool Then, make a colorimeter to check the pH, adjust it if necessary (see the paragraph concerning the => pH).

You have adjusted the TAC and pH values.

photo pool green water algae

Now do the shock treatment

icon web warning treatment water It is not advisable to swim during a shock treatment as long as the chlorine level is not correct for swimming (especially for children).

icon web chlorine treatment pool Your pool is 50 m³ and your filtration is in forced operation (continuous).

icon web chlorine treatment pool Use at least 1.5 l of pure bleach for 10 m³. Therefore you need 7.5 l of pure bleach for a 50 m³ pool.

icon web chlorine treatment pool Apply the bleach evenly and directly into the pool.

During the 24 hours following the shock treatment, wash and rinse the filter to clean the algae and bacteria present in it (if your filter is still dirty, repeat the operation several times).

Brush the walls of the pool, clean and vacuum the bottom with your robot (if you have a robot, otherwise do it by hand).

To get clear water faster, you can put flocculant socks (check compatibility with your filter: cartridge filter, diatomaceous earth filter, sock or paper) in the skimmer to improve the performance of your filter. The flocculant allows the concentration of fine particles suspended in the water, they regroup, become larger and will be better captured by your filtration.

If you do things in order and correctly, your water will become clear within 48 hours.

Finally, perform a super cleaning and rinsing of your filter.

image swimming pool clear water

icone web pool stabilizer treatment The chlorine stabilizer

What is it?

Chlorine stabilizer (isocyanuric acid) is a chemical used in swimming pools to protect the chlorine molecule from the sun's UV rays to prolong its effectiveness.

Stabilizer is a useful product in small doses, provided that it is correctly dosed. This is why we do not recommend chlorine pebbles with stabilizer, each pebble added in the pool increases the stabilizer little by little. It is essential to dose it individually at the beginning of the season to avoid having saturated and unmanageable water.

Dosing of chlorine stabilizer

For the dosage of the stabilizer, we recommend a maximum dosage between 20 and 30 ppm.

icone web pool stabilizer treatment With 100 g of stabilizer, you provide 10 ppm or mg/l for a volume of 10 m³ of water.

icone web pool stabilizer treatment If you have a pool with 50 m³ of water, you need 1 kg of product : (100 gr x 5 )= 500 gr of product for only 10 ppm, so 500 gr x 2 => 1 kg to have 20 ppm icone web pool stabilizer treatment). Do it in 2 times, analyze your water between each dose to avoid mistakes (follow the manufacturer's instructions on the label of the product concerned). Your filtration pump must be running, pour the product directly into the skimmer or buffer tank, and in the absence of any other product.

Check the stabilizer level during the season and adjust it if necessary.

icone web pool stabilizer treatment Be careful with the stabilizer

If you have too high a concentration of stabilizer, you will face irreversible problems. Indeed, algae will start to proliferate and the water of your pool will become green whereas you have chlorine in sufficient quantity in your pool but it does not act any more because its action is stopped by the over-stabilization. The only thing you have to do is to drain your pool water (you cannot remove the stabilizer already present in the water) in order to find a level between 20 and 30 ppm (don't forget to control and adjust the TAC and pH if necessary).

icon web water cleaning pool Cleaning, filtration and maintenance

cleaning maintenance pool water treatment

There are several key steps to follow to keep your pool clean and in good condition:

hand bubble water treatment pool Regularly clean the bottom and sides of the pool: Use a manual broom or electric cleaner to remove debris and dirt that has accumulated on the walls and bottom of the pool. Also be sure to empty the pre-filtration baskets (filter pump basket + skimmer baskets) to prevent debris from entering the filtration system.

hand bubble water treatment pool It is imperative to clean the pool water with a net to pick up large debris floating on the surface of the water (leaves, insects, etc.). This can be done at each swim.

hand bubble water treatment pool Take a shower before swimming to get rid of products on your skin like makeup or tanning creams.

hand bubble water treatment pool Check the pressure of your filter daily, wash/rinse it because it is the filter that keeps the pond water clean, it is installed to stop impurities so wash and rinse it regularly.

hand bubble water treatment pool Good water circulation: It is important to circulate the water in the pool to prevent the formation of algae and bacteria. Make sure your sand or cartridge filter is in good condition and working properly.

Filtration times

To calculate the hours of operation of your filtration, simply know the temperature of your water and divide it by 2.

Example :

hand bubble water treatment pool Your water is at 20°C => you divide by 2 and that gives you 10, so 10 hours of operation, minimum, per day.

During the high heat of summer (+/- from 28°C), we recommend a 24-hour filtration.

photo family swimming water pool

Now all you have to do is enjoy web icon blue thumb direction

We are here to help you...

Any questions? Do you need documentation or a quote? The entire Ozonex team is at your disposal.

Contact us

app pool automation water treatment
app pool automation water treatment