Chlorine generator is a pool equipment device used for automatic water disinfection through salt electrolysis. In practice, this means that instead of regularly adding traditional chlorine in tablets or granules, the user adds an appropriate amount of pool salt to the water, and the device independently produces active chlorine. Does this solution work? Is it worth using?
This system is becoming increasingly popular in both garden pools and larger residential installations. This is mainly due to user convenience, more stable water quality, and a reduction in the intense chlorine smell. However, it also has its own specifics and disadvantages resulting from the use of salt - which you need to be aware of when deciding to purchase a chlorine generator for a pool, especially concerning the negative impact of salt on some pool system components, particularly pool heat exchangers - if they are not made of titanium.
The basis of a chlorine generator's operation is the so-called salt electrolysis. A small amount of salt is added to the pool water, usually at a level of 3–5 g per litre of water. Then the water flows through the electrolytic cell located in the device. The amount of salt, although small, is crucial because it is added regularly.
During the flow, an electric current splits the salt molecules, resulting in the production of active chlorine responsible for water disinfection. This chlorine effectively removes:
After performing its function, the chlorine converts back into salt, so the process is partially closed-loop and highly efficient.
The chlorine generator certainly has many advantages that convince users to give up traditional pool chemicals.
The most important benefits are:
The device continuously produces the right amount of chlorine, making the disinfection level more stable than with manual dosing of chemicals. You don't have to remember to add chlorine tablets.
The water in a pool with a chlorine generator typically has a less intense smell than with traditional chlorination. For many people, it is also gentler on the skin and eyes. Anyone who uses chlorine tablets knows that for 1-2 days after adding them, the chlorine smell is very intense, which is unpleasant.
Although purchasing a chlorine generator is more expensive than standard pool accessories, in the long run, you can reduce spending on pool chemicals. But this may be a false economy, because as we mentioned, salt is an aggressive substance - and its use also requires adapting other pool components to its presence. The most delicate in this context are heat exchangers, i.e., components that transfer heat from the heat source to the pool water.
❌ Salt electrolysis and constant contact with salt can however also cause heat exchanger leaks, and sometimes faster wear of pool pumps. In most cases, adding salt to the water therefore eliminates the possibility of using steel exchangers (sooner or later a leak will occur, and it will be out of warranty - if salt is added to the pool). In such cases, you must use titanium exchangers - and this increases the cost of investing in the pool's heating system.
It must be taken into account that pool heat exchangers (like plate exchangers) are not built from large blocks of steel, but from thin tubes - so that heat exchange is efficient and heating is relatively cheap and effective. Such a device cannot be used with salt water - steel with a thickness of 0.4-0.5mm will degrade in the long term. Hence the need to use the much more expensive material which is titanium.
Not completely. A chlorine generator significantly reduces the amount of chemicals used, but it is still necessary to control water parameters.
In particular, you should monitor:
In many cases, users still use:
Therefore, the chlorine generator does not completely replace pool maintenance, but it definitely simplifies it.
The chlorine generator is usually installed on the pool's filtration system. The device should be placed after the filter and pump so that purified water flows through the electrolytic cell.
Installation typically includes:
In the case of simple garden pools, installation can often be done by yourself. For larger installations, however, it is worth using a specialist's help.
Despite many advantages, the chlorine generator is not an ideal solution for everyone.
The most frequently mentioned disadvantages are:
Water with added salt can accelerate corrosion of some metal elements if they are not properly protected. This applies not only to the aforementioned pool heat exchangers, but also, for example, to drainage systems made of steel in the longer term.
In many cases, yes. The chlorine generator is a particularly beneficial solution for people who:
The greatest benefits are felt by users who regularly maintain their pool throughout the season. Although the initial purchase cost may be higher, the convenience of use and lower chemical consumption often compensate for the investment after a few seasons.
A pool chlorine generator is a modern solution enabling automatic water disinfection through salt electrolysis. The system provides more convenient pool maintenance, more stable chlorine levels, and more comfortable water for users.
Despite the need to control water parameters and perform periodic device maintenance, the chlorine generator is a fairly practical solution for many pool owners. It works particularly well in larger garden pools and wherever daily handling convenience is important - but one must remember the inconveniences and corrosion risks, especially concerning heat exchangers.
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