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Rust stains in swimming pools

The best way to remove rust stains in swimming pools is by using our rust stain treatment kit.  Most rust stains in swimming pools are caused from metal objects that have fallen into the pool such as hair pins, nails, toys or other metal items. When these items are immersed in salt water, they begin to rust and stain the pool surface within a few days. We remove these types of rust stains every day without draining the pool.

Rust fragments can also settle in a pool when building work, grinding or cutting of metals is done near the pool. These fragments will not be noticeable at first but will begin to rust a few days later and appear like small rust spots. Small rust spots can also be introduced to the pool from cheap pool salt containing small metal fragments.

The good news is that our treatments can remove rust stains completely within a few days without draining the pool or acid washing. Our process is very effective in treating and removing rust stains from concrete, vinyl lined and fibreglass pools. Our products sometimes completely remove mild rust spots in less than one hour!

If you suspect that your rust stain is from the pool reinforcing steel scroll to bottom of page…

Signs of pool rust staining:

  • Brown stain that won’t brush away
  • Retail stain products won’t remove it
  • Shapes like object (eg. nail, bottle top)
  • Stain not growing or changing colour

We remove rust stains without draining your pool water

We remove rust stains from every type of pool finish. As the images show, we can remove stains from swimming pool surfaces without draining the pool water, blasting or acid washing. Remember, our treatment is a fraction of the cost of an acid wash and a lot faster and a lot less hassle!

If you are unsure of the type of stain you have please feel free to speak with us. There is no cost or obligation.

Rust stain in swimming pool
rust stain in fibreglass pool
Rust stain in Fibreglass pool

OPTION 1 – Rust Stain Removal DIY kit

What We Do 1


pool stain removal


pool stain removal



  • 1 Litre of our powerful rust stain removal formula
  • 4 Kgs of our granular rust dissolving compound
  • Phone support from our technicians
  • Simple step-by-step instructions included
  • Pool does NOT need to be drained
  • Kit is delivered and tracked by Fastway Couriers
  • Kids are back in the pool in just 7 days
  • Kit is $295 for pools 45,000+ Litres


Enquire now!

OPTION 2 – Rust Removal – On Site Technician


pool stain removal


pool stain removal



  • 1 Litre of our powerful rust stain removal formula
  • 4 Kgs of our granular rust dissolving compound
  • Your pool does NOT need to be drained
  • Complete 7 point on site water testing
  • Kids are back in the pool in 7 days
  • Visit is $405 for pools 45,000+ Litres


Enquire now!

What causes rust spots on pool walls

If your rust stain has not from an object that has fallen into the pool and is dark in colour and continues to get bigger, it may be coming from the reinforcing mesh used in the pool’s structural shell. Although this type of rust stain is very uncommon, it differs from normal rust stains because it continues to look worse over the life of the pool (see pictures below). Importantly, this type of rust stain needs to be physically drilled out, plugged and sealed in order to stop the steel from reacting (rusting) with the water. To repair this problem coloured epoxy products which are designed for use in swimming pools are used to plug the hole.

Although our chemical treatments will improve the appearance of these types of stains, they may reappear after a few weeks or months if nothing is done to permanently isolate the rusting steel from the pool water. If you would like further information about how these types of stains can be repaired please call us.

Reinforcing steel is causing the stain if…

  • Stain leaves a brown trail
  • Stain is slowly getting bigger & darker
  • Dark stain on the vertical walls
  • Stain returns after removal/cleaning


rust stain from reinforcing
rust stain from reinforcing in swimming pool
rust from reinforcing mesh

Rust contaminates in the pebble mix

Less than 2% of rust stains are caused from small metal fragments, or contaminated pebbles within the aggregate in concrete pools. The metal fragments often come from the metal rollers that are used to crush the pebbles down to a particular uniform size.

Individual contaminated pebbles can have heavy mineral content and this mineral bleeds out over time. These stains may also leave a very small brown trail (only 1-2cm). Importantly, these stains normally appear soon after the pool is newly built and may multiply in certain areas over time. IN short, our treatment process rapidly accelerates the oxidization (rusting) process which will cause the rust stains to break down and dissolve permanently.

Rust stains 20

Removing metals from pool water

Customers who have widespread rust stains should consider using CuLator Metal Eliminator in addition to our treatment. This product will help remove the excess metals from the water to help prevent the stain from reappearing later. Our standard treatment will dissolve metal stains but will not physically remove all of them from the water. Remember, liquid metal treatments only ‘suspend’ rather than actually remove the metal from the water. However, CuLator Metal Eliminator is unique because it can physically remove metals from pool water. Remember, your pool shop will assist you in measuring the metal levels in your pool water.

Culator Metal Eliminator