Treatment of a swimming 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 bromine – although less commonly used – presents serious assets. Let’s do a check in.

Why use bromine to treat your swimming pool?

It is quite possible to use bromine to treat your swimming 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 gentle pool disinfectant has a significant 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 may present bromine allergy are relatively few.

You can find it in shops or at its pool specialist different forms of bromine, to 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, the action of which is slower than that of chlorine because it dissolves much less quickly.
  • The briquettes, also called the bromine pebbles, which we simply place in the skimmers.

Store bromine safely

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

Before use, bromine, whatever its form, must be stored high, if possible in his original package and in a local whose access is forbidden to children and domestic animals. It is better to reserve a specific cupboard for it so that it cannot be confused with another product.

Finally, the room intended for the storage of bromine must be dry, fresh But 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 the 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 se trouble where becomes green. But the advantage is that with bromine there is no risk of being confronted with the difficulty of having to catch up with over-stabilized swimming pool water.

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

We consider that for a spa the bromine concentration should be between 2 and 4 mg / l and for a swimming pool between 1 and 2 mg / l. To check this rate, all you have to do is use a colorimetric test. But an electronic pH meter can also be very useful, especially since the results it communicates are extremely precise. It is however a rather expensive device, which explains why many consumers are satisfied with the first solution.

Mandatory pH readjustment

The procedure for checking the bromine level is as follows: start by checking the pH of the swimming 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.

If a pH readjustment proves to be essential, in this case a suitable product is used, either a pH- or a pH +. There is a waiting time of at least 180 minutes before performing 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, you must first turn off the pump and then close the valves. 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 resorting to a bromine neutralizer, or by emptying the basin in part or in whole, which subsequently involves readjusting the pH level and then adding bromine. The use of a neutralizer is often the solution chosen 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 usually displays a high temperature, namely 30 ° C and above. Under these conditions, while chlorine loses nearly 80% of its effectiveness, bromine displays just the opposite while retaining 80% efficiency. But for it to be as efficient as possible thewater 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 bromine treated, especially since UV rays have no effect on its efficiency, nor really the temperature variations as we have just specified.

There is no need to worry about having to purchase specific equipment for bromine treatment. The only device to acquire in addition is the brominator since to be completely free of bacteria, microbes and algae, the pond water must pass through this equipment via the delivery nozzles.

Even if this purchase is not absolutely compulsory, it is more than recommended because the brominator guarantees a perfect diffusion of bromine. The ideal is then to opt for a bypass assembly on the hydraulic circuit – this is also called bypass 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 released slowly and continuously.

You should know that once the brominator is installed, it is necessary to start by launching a shock treatment of the swimming pool (with bromine obviously), 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 swimming pool with bromine, it is recommended to respect the following procedure.

Treating your swimming pool with bromine is very advantageous because it reduces the constraint linked to the daily maintenance of the basin because the diffusion of this halogen is slow and continuous. We recommend simply adding bromine to the water twice a month or using a bromine regenerator. 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 the pH. In the event of variation, it suffices simply to adjust this hydrogen potential, upwards or downwards.

Compared to chlorine, it is clear that bromine is more expensive to buy, around 35% and that you also have to budget to get a brominator, the price of which is between 100 and 260 €. But the expense can be worth it as there are many benefits to bromine that are becoming popular with more and more homeowners.