Treatment of a pool with bromine : principle and process

Bromine is part of the large family of halogens, chemical elements among which we also find chlorine. Both are used to treat swimming pool water, and the brome – although less commonly used – has serious assets. Let’s do a check in.

Why use bromine to treat your swimming pool?

You can absolutely use bromine to treat your pool because it allows you to take advantage of a perfectly disinfected water. This halogen oxidant eliminates:

  • The seaweeds,
  • Bacteria,
  • The microbes.

Compared to chlorine, this mild pool disinfectant presents a non-negligible difference: it is odorless, which is much more pleasant for swimmers, especially since it does not irritate the mucous membranes or the skin. People who can present a bromine allergy are relatively few.

You can find in stores or at your pool specialist different forms of bromineto know :

  • The lozenges to be placed in the brominator, knowing that it must imperatively be connected to the filtration. It makes it possible to obtain a continuous and slow diffusion of bromine whose action is slower than that of chlorine because it dissolves much less quickly.
  • The briquettesalso called the bromine pebbleswhich is simply placed in the skimmers.

Storing Bromine Safely

Bromine is not corrosive only when he is not diluted in water. It must therefore be handled with great care in order to avoid contact of the product with the eyes, the skin, the mucous membranes, and to limit the risk of inhalation at all costs. You can therefore wear protective glasses, gloves, a mask…

Before use bromine, whatever its form, must be stored high upif possible in its original package and in a local whose access is prohibited for children and pets. It is better to reserve a specific cupboard for it so that it cannot in any case be confused with another product.

Finally, the room intended for bromine storage must be sec, costs most sheltered from frost as is the case for all products intended for the treatment of swimming pool water.

Bromine, a treatment incompatible with a stabilizer

It is useful to specify that bromine being incompatible with a stabilizer, one must use either powdered chlorine without stabilizer, or calcium hypochlorite, or quite simply a bromine regenerator for a shock treatment as soon as thepool water with trouble or becomes verte. But the advantage is that with bromine there is no risk of being faced with the difficulty of having to catch up with over-stabilized pool water.

What is the optimal concentration of bromine in a swimming pool?

It is considered that for a spa the bromine concentration should be between 2 and 4 mg/l et for a swimming pool between 1 and 2 mg/l. To verify this rate, simply use a colorimetric test. But an electronic pH meter can also be very useful, especially since the results it communicates are extremely accurate. However, it is a fairly expensive device, which explains why many consumers are content with the first solution.

Mandatory pH readjustment

The procedure for checking the bromine level is as follows: start by checking the pH of the pool water because, depending on the result obtained, the bromine level must be within a specific range in order to be considered as normal. Thus, it must be between 3 and 5 mg/l for a pH greater than 8.2 and between 1.2 and 3 mg/l if the pH is greater than 7.5.

And a pH readjustment proves to be essential, in this case a suitable product is used, either a pH- or a pH+. We respect a waiting time of at least 180 minutes before proceeding to a new test. It may be necessary to repeat the procedure until a satisfactory pH.

Readjustment of the bromine level

If this rate is insufficient, the pump must first be switched off and then the valves closed. Then fill the brominator with bromine tablets then open the valves and reactivate the filtration system. Finally purge the brominator.

When the bromine level is higher than normal it must be lowered either by using a bromine neutraliser, or by partially or completely emptying the pool, which subsequently involves readjusting the pH level and then adding bromine. The use of neutralizer is often the chosen solution because it is not necessary to drain the pool. The correct dosage is as follows: there are 2 g of neutralizer for each milligram of bromine per liter of water to be deactivated and for each cubic meter of water.

Bromine treatment: indoor, outdoor pool and spa

Bromine is particularly interesting for treat indoor pools and spas where the water generally has a high temperature, namely 30°C and above. Under these conditions, while chlorine loses almost 80% of its efficiency, bromine shows the opposite, retaining 80% efficiency. But for him to be as efficient as possible l’eau must be alkaline. This is the reason why its Hydrogen potential (pH) must be greater than 7.

Of course, the outdoor swimming pools can also be brominatedespecially since UV rays have no effect on its effectiveness, nor really temperature variations as we have just specified.

There is no fear of having to buy specific equipment for bromine treatment. The only device to acquire in addition is the brominateur since to be completely rid of bacteria, microbes and algae, the pool water must pass through this equipment via the discharge nozzles.

Even if this purchase is not absolutely compulsory, it is more than advisable because the brominator guarantees a perfect diffusion of bromine. The ideal is then to opt for a branch assembly on the hydraulic circuit – this is also called by-pass assembly. It is thanks to a valve that the water flow can be regulated. Thus, as soon as the pump is activated, the bromine is diffused slowly and continuously.

You should know that once the brominator is installed, it is necessary to begin by starting a shock treatment of the pool (with bromine of course), which allows the bromine level in the pool water to rise quickly.

Treating swimming pool water with bromine: process

To optimize the treatment of the pool with bromine, it is recommended to respect the following procedure.

Treating your swimming pool with bromine is very advantageous because it reduces the stress linked to the daily maintenance of the pool because the diffusion of this halogen is slow and continuous. We simply recommend adding bromine to the water twice a month or using a bromine replenisher. At the same time, it is essential to monitor the pH of the water approximately every 5 to 6 days since, as we have seen, the effectiveness of bromine is linked to pH. In case of variation, it is enough simply to adjust this Hydrogen potential, upwards or downwards.

Compared to chlorine, it is clear that bromine is more expensive to buy, by about 35% and that you also need to plan a budget to get a brominator, the price of which is between 100 and 260 €. But the expense can be worth it because bromine has many benefits that are appealing to more and more homeowners.

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