Many people buy dishwashers but only use detergent tablets while skipping salt, thinking "my tap water is already soft." This is an extremely common and costly mistake. Dishwasher salt is not for cleaning – it's for protecting your machine.
1. What is dishwasher salt?
Dishwasher salt (regeneration salt) is pure NaCl in large granules, with a purity of over 99.9%. It is completely different from common table salt or sea salt: it contains no added iodine, no mineral impurities, and its large granule size ensures slow dissolution throughout the wash cycle.
2. What does dishwasher salt do?
2.1. Softens water
Tap water in Vietnam, especially in major cities like Hanoi, Hai Phong, and Ho Chi Minh City, has a medium to high hardness (8-15°dH). Calcium and magnesium ions in hard water will:
- Precipitate as limescale on glass → cloudy white spots.
- Reduce the effectiveness of detergents in dishwasher tablets.
- Adhere to the heating element and spray arms → machine wears out quickly.
The ion exchange system in dishwashers requires salt to regenerate the resin beads, thereby removing calcium/magnesium ions before water enters the wash chamber.
2.2. Protects the machine from limescale
Without salt, limescale directly adheres to the heating element. Every millimeter of scale increases electricity consumption by ~7-10%, and after 2-3 years, it can cause the heating element to burn out. The cost of repair is equivalent to many years of using salt.
2.3. Keeps glass clear and dishes spotless
The combination of salt + rinse aid results in dry, sparkling dishes, free of spots and water marks – just like what you see in high-end restaurants.
3. Frequently Asked Questions
3.1. Do I need salt if I already use All-in-One tablets?
Yes. All-in-One tablets only replace salt within a water hardness limit of 21°dH. Tap water in most areas of Vietnam is often above this threshold during the dry season, so it is still advisable to add salt to be sure.
3.2. Can I use table salt as a substitute?
Absolutely not. Table salt contains iodine and impurities → it clogs pipes, damages resin beads, and can cause undesirable reactions.
3.3. How long does a 2kg box of salt last?
Depending on usage frequency and water hardness, it typically lasts 2-4 months for a family of 4 running the dishwasher once a day. When the salt indicator light comes on → refill immediately, do not let it run out.
4. Largo German Dishwasher Salt 2kg – The optimal choice
- Directly imported from Germany, in original packaging.
- Large, uniform salt grains, 99.9% pure, dust-free, and non-caking.
- Suitable for all dishwasher brands: Bosch, Siemens, Electrolux, Hafele, Malloca, Teka, etc.
- Very competitive price – only 175,000 VND/2kg, equivalent to 87,500 VND/kg.
Order now: Largo German Dishwasher Salt 2kg – 175,000 VND.
5. Conclusion
Dishwasher salt is a small accessory that determines the lifespan of your dishwasher. Don't try to save a few hundred thousand VND per year at the cost of a multi-million VND dishwasher. Combine it with Largo Classic detergent tablets and Largo rinse aid for optimal results.
Or choose the Largo 3-item combo to get the full set at the best discounted price.