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Water softener salt needs to be chemically pure. Most rock salt has high levels of impurity because it is untreated. Rock salt is therefore not normally suitable for water softeners.

Sea salt (or solar salt) will start off impure. Sophisticated processors can then wash it repeatedly to achieve the purity required for water softeners. However you should be wary of using poorly washed sea salt as high levels of hardness minerals (and even sand) can require frequent cleaning of salt tanks. Julian Hobday of KindWater

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12y ago

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Rock salt is unrefined and may contain impurities that can be harmful to water softeners, while water softener salt is specifically designed for use in water softening systems and is formulated to be highly soluble and pure. Water softener salt helps remove minerals like calcium and magnesium from hard water, preventing scale buildup in pipes and appliances.

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9mo ago
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Q: What the difference between rock salt and water softener salt.?
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