Question: what is the difference between dishwasher salt and water softener salt?
Answer: Analogous to water softener salt, dishwasher salt regenerates ion exchange resins, expelling the therein trapped calcium and magnesium ions that characterize hard water. Dishwater salt granules are larger than those of table salt. ... Table salt may contain added iodine in the form of sodium iodide or potassium iodide.