My last pool was a "salt" pool. The level of salt in the pool is not noticeable, nothing like the ocean. The unit then separates the chlorine from the salt as needed to maintain . No big swings in chlorine levels as you add it then 'gets used up' and you have to add again. The maintenance of needing to add salt is much less and is not really noticeable as a swimmer. Very much recommended, I would not build a pool without it.
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