Not All Salt Is Created Equal: Farmers Market Salt vs A-Grade Water Treatment Salt
When it comes to water treatment, something as simple as salt can make a big difference.
Salt is commonly used in water softening systems to regenerate the resin inside the softener. But not all salt is manufactured to the same standard. The difference between general-purpose or locally sourced salt and A-grade water-treatment salt can affect the quality of the brine, the performance of the equipment and the amount of residue left behind.
The image above gives a simple visual comparison.
On the left: Farmers market salt
On the right: A-grade salt
π What Is the Difference?
At first glance, both products may simply look like βsalt.β However, the important differences are often found in purity, consistency, moisture and insoluble material.
π§ Farmers Market Salt
Salt sold at farmers markets or through general suppliers may vary considerably depending on where it comes from and how it has been processed.
It can contain varying amounts of:
- Fine particles and dust
- Insoluble minerals or sediment
- Moisture
- Other naturally occurring materials
- Irregularly sized salt crystals
In the photograph, the difference is particularly visible. The sample on the left produces a cloudier appearance, while the salt itself appears much finer and more powder-like.
This doesn't automatically mean that every locally sourced salt is unsuitable for water treatment. The actual suitability depends on its specification and testing. However, a salt that has not been produced specifically for water-treatment applications may provide less consistency from one batch to another.
π§ A-Grade Salt for Water Treatment
A-grade water-treatment salt is produced and selected with water-treatment applications in mind.
The objective is to provide salt that dissolves effectively during the regeneration process while minimising unwanted material entering the system.
The sample on the right shows noticeably larger, cleaner and more consistent crystals.
For water-treatment applications, these characteristics can be beneficial because the salt is intended to produce a consistent brine solution for regeneration.
Why does that matter?
Water softeners use a brine solution to regenerate their ion-exchange resin.
When the salt dissolves, it forms the brine used during the regeneration cycle. The cleaner and more suitable the salt, the less unnecessary insoluble material is introduced into the brine tank.
This can help reduce:
β Salt residue and build-up
β Sediment in the brine tank
β Unnecessary cleaning and maintenance
β Problems caused by undissolved material
π The Difference You Can See
Our photograph demonstrates the difference visually.
The farmers market salt on the left appears finer and produces a noticeably cloudier sample.
The A-grade salt on the right consists of larger, more uniform crystals and produces a clearer-looking solution.