How-to

How to Add Salt to a Water Softener

How much salt to add, how often, which kind, and how to avoid bridges and mushy salt.

By Softenry Editorial · Updated October 2026

The short answer

Keep the salt above the water in the brine tank, refill before it runs out, and use the type your maker recommends.

Steps

  • Check the level: salt should stay above the water.
  • Break any crust before adding salt.
  • Pour bags in gently; don't overfill in humid spaces.
  • Note the date so you can learn your usage.

How often

It depends on your hardness and household; the salt calculator estimates pounds a week.

Which salt

Pellets: Morton 1499 25 lb Softener Salt Pellets, Diamond Crystal Bright & Soft Softener Salt Pellets. Solar crystals: Snow Shield 50 lb Solar Salt Crystals.

Products mentioned

Questions readers ask

How full should a water softener salt tank be?
Above the water line and typically half to two-thirds full; overfilling in humid spaces encourages bridges.
How often do I add salt?
Typically every few weeks; it depends on your hardness and household.