Salt stains in swimming pools

In recent years, there has been a significant increase in salt stains in swimming pools.  This is because of an increase in cheap and low-quality salts sold in Australia. These low-quality salts are not graded to the same standards normally seen in Australia. Also, some large hardware retailers buy enormous volumes of low-grade salt and sell it at very low prices. As a consequence, issues with heavily contaminated salts and salt staining in swimming pools has increased.

Salt stains can appear in several forms and colours. For example, cheap pool salt with small metal fragments can cause very small rust spots to appear. Furthermore, prolonged use of salt with a light brown (minerals) appearance can lead to general discolouration on the pool surface over time. Remember, it is not the salt that stains your pool but rather the minerals and metals found in low-quality salt. To read more about how to find good quality salt click here.

The good news is that our treatments remove salt mineral stains completely without draining the pool or acid washing. Finally, our proven treatment process is very effective in treating and removing salt stains from Pebblecrete, Quartzon, vinyl-lined and fibreglass pools.

5 Signs of salt staining:

  • Brown stain that won’t brush away
  • Retail stain products won’t remove it
  • Brown stains toward the deep end
  • Dark stains where salt is added
  • Water turns murky when salt is added
swimming pool salt grading

Good Quality Salt

Low moisture content
Salt is vivid white
Product has small crystals
 It is fast dissolving
 Has low mineral content
 Product was not the cheapest

Poor Quality Salt

High moisture content
Crystals seem slightly brown
Has large crystals
Takes hours to dissolve
High mineral content
Salt was a real bargain

stain from magnapool salt
iron stains
Iron stains in swiming pool
Iron Staining in swimming pool

Remove salt stains without draining your pool

Almost all salt stains in swimming pools can be completely removed using our treatments. As the images show, we completely remove salt stains from swimming pool surfaces without draining or acid washing. Remember, our treatment is a fraction of the cost of an acid wash!

If you are unsure of the type of stain you have please feel free to contact us.

OPTION 1 – Salt Stain Removal DIY kit

What We Do 1


pool stain removal


pool stain removal



  • 1 Litre of our powerful salt stain release and prevention formula
  • 4 Kgs of our granular salt stain dissolving compounds custom made for your stain
  • Phone support from our technicians
  • Simple step-by-step instructions included
  • Pool does NOT need to be drained
  • Kit is sent and electronically tracked by Fastway Couriers
  • Kids are back in the pool in just 7 days
  • Kit is $295 for pools 40,000+ Litres


Enquire now!

OPTION 2 – Salt Stain Removal – On Site Technician


pool stain removal


pool stain removal



  • 1 Litre of our powerful salt stain release and prevention formula
  • 4 Kgs of our granular stain dissolving compounds custom made for salt stains
  • Complete 7 point on-site water testing
  • Your pool does NOT need to be drained
  • Kids are back in the pool in 7 days
  • Visit is $465 for pools 40,000+ Litres


Enquire now!

Remove copper from pool water

CuLator Metal Eliminator removes copper and most other metals from pool water. This helps to prevent metal stains from appearing in your pool later on. This product is unique because it can physically remove metals and other minerals from pool water. Your pool shop will help you to measure the metal levels in your pool water. Click here for more information about CuLator Metal Eliminator.

Culator Metal Eliminator

What causes salt staining in pools

Contaminated swimming pool salt.

Inexpensive salts have large, light brown crystals (grains) which take longer to dissolve. Because large crystals are slower to dissolve staining is more likely.  Always make sure that your pool salt is thoroughly dissolved and not left to sit on the floor of the pool. Remember, the minerals in low-quality salts can leave a light brown haze on the surface of your pool. Examples of what that may look like can be found here.

Poor methods are used when adding salt.

Some pool owners will pour the entire bag of salt in at the shallow end of the pool hoping that water movement will dissolve and distribute the salt over time. Although most pool owners are smarter than this, concentrated salt stains are still a very common type of staining. So make sure to disperse the salt around the entire pool and then brush it until it is completely dissolved. Good quality, fine salt should dissolve very quickly when added to the pool water. Therefore, if you find that you are spending a long time brushing to dissolve your pool salt, you may want to try a different brand.

Contaminated or mineral-rich salt crystals.

Salt can sometimes have individual discoloured crystals in the bag. Remember that even the very best quality salt will have the occasional contamination from time to time. However, if you experience this frequently, you may want to consider changing your brand or supplier of salt. Above all, remember that cheap salt is cheap for a reason.

Balance the pool before adding salt

When the pH of water is high, water loses its capacity to hold microscopic minerals and metals in suspension. This means that the brown minerals and metals often found in pool salt will plate out (or precipitate) to the pool floor and walls and leave a dark stain. Therefore, salt staining will most commonly present as a dirty brown colour or dark grey depending on the colour of the pool surface. Also, salt will rarely leave a white stain in your pool. It will almost always be brown or grey coloured. Remember, always balance the pool water BEFORE adding salt.   If you have white stains or lumps in your pool click here as you most likely have calcium.