
Here are 6 common types of water softener salt:
Continue reading for a detailed guide on different types of water softener salt to know which is best.
🎯What Are The Different Water Softener Salt Types?
🍵Evaporated Salt For Water Softeners

It is the purest form of sodium-based salts. It is an ideal choice for most softener systems, especially those requiring high performance, like single-tank systems or homes with more than 10 GPG water hardness.
Its efficiency and purity level ensure optimal softening and regeneration cycles, leading to longer resin life and less maintenance of the resin tank.
Pros
- Highly refined
- Dissolves efficiently
- Doesn’t clump and form salt bridges
- Maximizes softener efficiency and ensures its longer lifespan
Cons
- Slightly more expensive than other options (but worth it)
☀️Solar Salt For Water Softeners
Solar salt is an excellent choice for environmentally conscious homeowners with less than 10 GPG water hardness. Its natural production by sunlight makes it a sustainable option, and its high purity ensures proper softening.
Pros
- High purity
- Budget and eco-friendly
Cons
- It may dissolve slower than evaporated salt (so there are more chances of salt bridging or mushing)
- It’s not ideal for more than 10 GPG water hardness, high-demand situations, or both
🪨Rock Salt For Water Softeners

Extracted from underground salt sources, it is the perfect salt form for homes with high water usage thanks to its affordability and large granules that resist clumping.
However, this type of salt can require more frequent refilling due to its size.
Pros
- Large granules resist clumping
- Inexpensive option
- Ideal for high water usage
Cons
- Requires more frequent cleaning and refilling due to large size
- It may dissolve slower
Also Read: Can You Use Rock Salt To Melt Ice?
🅱️Block Salt For Water Softeners
Busy homeowners and those with low-maintenance systems often opt for block salt’s long-lasting convenience. This type of salt is slow-dissolving and requires less frequent refilling. Its large size may not fit all softeners.
Pros
- Slow-dissolving
- Requires less frequent refilling
- Convenient for low-maintenance systems
Cons
- It can be messy to handle
- Larger sizes may not fit all softeners
🧪Potassium Chloride For Water Softeners

A sodium-free alternative for those on dietary restrictions to reduce their sodium intake. It’s just as effective in softening water but gentler on the body for people with sensitive or dry skin
Pros
- Sodium-free
- Less likely to cause skin irritation
Cons
- More expensive than sodium chloride
- It may dissolve more slowly (so you have to increase the water softener hardness level by 25%)
- It is not ideal for highly humid areas
🪛Rust Defense Water Softener Salt
If your well water supply causes pesky iron rust stains, this specially formulated salt contains additives like citric acid to chelate iron and prevent rust on the water softener brine tank.
💡Pro Tip:
Water softener salt also comes in two forms: pellets and crystals. The pellet form is generally larger and dissolves slower, while the crystal form is smaller and dissolves faster. Choose pellet types of salt for high water usage for optimum water softening process.
🤔How Do I Know What Softener Salt to Use?
Consider these 4 factors in mind:
💪Water Hardness

👉Water Usage
💦Water Softener Type
⚙️Water Softener Maintenance

💡Water Softener Salt: FAQs
What is better, salt pellets or crystals?
Water softener salt pellets are best because they have larger granules that dissolve slowly, require less frequent refilling than crystals, and are ideal for high water usage or single-tank systems.
Which is better, potassium chloride or sodium chloride, for a water softener?
Sodium chloride (NaCl) is best for water softener as it dissolves correctly and ensures effective water softening.
Potassium chloride salt dissolves faster, is more expensive than NaCl, and its softening is less effective.
What’s the difference between blue and yellow water softener salt?
Crystal salts are kept in a blue bag (hence blue water softener salt), and pellet salt is kept in a yellow bag (hence yellow water softener salt).
Choose yellow water softener salt for best results.
How do you know when to add salt to a water softener?
You will know when to add salt to the water softener when:
1. The salt level is below 25% in the brine tank.
2. Water softener alarm goes on (or you get app alerts)
Is it OK to run a water softener without salt?
No, running a water softener without salt is not OK, as salt is essential in the ion exchange process that softens the water.
If you run a water softener without salt, the water softener resin beads will eventually become saturated with hard minerals and lose effectiveness.
This can result in hard water flowing into your plumbing and affecting the life of appliances, leading to the problems you were trying to avoid by using a water softener in the first place.

HOW AND WHERE CAN ONE GET THE EVAPORATED SALT FOR WATER SOFTENERS?
IS EVAPORATED SALT COME IN PELLET FORM AS RECOMMENDED OR ONLY IN CRYSTAL FORM
THANKS FOR ANY REPLY!
Evaporated salt for softener come in pellet form. You can go for diamond crystal pellet salt: https://www.homedepot.com/p/Diamond-Crystal-40-lbs-Bright-and-Soft-Water-Softener-Salt-Pellets-100012420/100614653