Yes, the brand and quality of water softener salt you use matter significantly for the longevity and reliability of your system. High-purity evaporated salt pellets (which are 99.9% pure sodium chloride) dissolve cleanly and leave minimal residue, drastically reducing the risk of tank sludge and salt bridging. Conversely, cheap rock salt contains high levels of insoluble dirt, silt, and stones that accumulate at the bottom of the brine tank, clogging injector valves and fouling the resin bed over time. Verification: Inspect the bottom of your brine tank during annual cleanings to check for accumulated insoluble sediment and sludge.
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