It is possible that the main reason for choosing a salt water chlorination system for your swimming pool comes down to long term cost, since although there is an upfront cost and replacement cost of the terminals from time to time, adding salt the pool instead of chlorine granules or tablets does have a cost benefit.
However, for many people the other benefits of salt water pools make a compelling case. For example, salt water tends to be far softer and thus less drying on the skin than chlorinated water. PH balance is not as important to monitor. Rinsing your hair and swimming costumes to avoid discoloration becomes less important. For many, saying goodbye to stinging eyes and running noses from the harsh chemical fumes of chlorinated water is cause enough to install a salt chlorinator.
There are some downsides, though. Some claim that there is no cost benefit, part of the reason to base a decision on multiple factors. There can also be some scale buildup as the terminals can begin dropping scale into the water, which can then accumulate on the walls. If you have any screws in the pool, such as those fastening a light in place, they can begin to rust if they are steel-based, such as chromed screws.
Ultimately, the decision for installing a salt chlorinator versus using granular or tablet chlorine comes down to personal preference. The technology has been around for decades already and has long proven itself in private pools around the world.
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