Deionized (DI) water is available through online retailers, specialized local shops, and some big-box stores. While often confused with distilled water, DI water is specifically processed using ion-exchange resins to remove mineral ions like calcium and iron. Where to Buy In-Person
Online marketplaces offer the widest variety of grades (e.g., reagent or laboratory grade) and bulk sizes.
: In large supermarkets like Tesco or Asda , check near the antifreeze and steam iron supplies.
: Specialty aquatic shops often sell DI or RO/DI (Reverse Osmosis/Deionized) water for sensitive saltwater tanks. Big-Box Retailers & Supermarkets :
Can deionized water be used instead of distilled ... - Facebook
: Has been known to sell deionized water, though sometimes with electrolytes added back for taste.
: Sometimes carries DI water in the automotive or hardware aisles.
