Rust Stains in Pool

Remove rust stains in pool

Stop wasting money on ‘all-in-one’ treatments that don’t touch rust. Our stain treatment kit offers an easy solution for removing rust stains without draining the pool.

Our treatment works on all types of rust marks including shavings from metal cutting, nails, or pool toys. At first, these stains are almost invisible, but after a few days, they leave rust stains on the pool surface.

Mystery spots? If tiny rust flecks are appearing out of nowhere, the cause is likely low-quality pool salt containing trace metal impurities. Our kit targets these contaminants at the source, dissolving the stain and restoring your surface.

Rust stain removal without draining

Our treatment removes rust stains within a few days without draining the pool or acid washing. Our process works on all surfaces such as plaster, vinyl-lined, and fiberglass pools. Often stains are completely removed in less than one day!

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

Signs of rust stains

I've got tiny rust spots in my pool

Some pool owners are confused by the sudden appearance of millions of tiny rust spots in their pool. If your “rust spots” appeared after adding salt to your pool, you likely have metal-contaminated salt. Low-quality salt carries trace iron that oxidizes in chlorine, creating reddish-brown streaks on your plaster or liner. These stains settle quickly in “dead spots” where circulation is low.

While iron is the main culprit, manganese and copper can also be present in poor-grade salt.

If you think you have salt stains please visit our salt stains page.

Get a Free Stain Diagnosis Before You Order

Leaving a rust stain on your pool surface for an extended period can make removal much harder to remove. We suggest doing something about rust stains as soon as you can.

Here is why pool owners and pool manufacturers trust us:

No Draining Required: Save thousands of gallons of water and avoid the risk of a “popped” pool shell.
Surface Safe: Unlike harsh muriatic acid, our treatment lifts the metal without eating your plaster or fading your liner.
Visible Results in days: Our treatment has seven active ingredients which allow it to remove a wide variety of rust stains.
Our ‘No Waste’ Promise: We won’t sell you a kit for structural rebar damage or for rust stains that our chemicals can’t fix. We value your results more than a quick sale.

If you would like to email or text us a picture of your pool stains before you buy, please send your picture to our contact details below.

Rust Stain Removal Options

Rust Stain Removal DIY kit

(64oz) of our powerful rust prevention formula
9 lbs of our rust dissolving compound
Phone support from our technicians
Simple step-by-step instructions included
Pool does NOT need to be drained
Kit is shipped and fully tracked by UPS
Kids are back in the pool in just 7 days
Kit is $295 for pools 12,000+ gallons

$245

Rust Removal –
On Site Technician

(64oz) of powerful rust prevention formula
9 lbs of 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 $425 for pools 12,000+ gallons

$405

Our Company Credentials

See our results on old and new pools

Frequently Asked Questions

Tap below to reveal answers

Can I remove rust from a pool without draining it?

Yes. Our treatment is designed to remove rust stains while the pool remains full. Draining a pool is not only expensive and a waste of water, but it also carries risks like drying out and cracking the interior surface. Our DIY Rust Kit uses a chemical reaction to dissolve the rust into the water, where it is then captured and removed, saving you thousands in refilling and chemical re-balancing costs.

Will muriatic acid remove rust stains?

Want to void your pool surface warranty instantly? Muriatic acid often makes things worse. While some “old school” methods suggest using muriatic acid through a PVC pipe to spot-treat, this is highly aggressive. Acid works by eating away a layer of your pool’s plaster to reach the stain. This “etches” the surface, making it rough to the touch and more porous—which actually allows future stains to bond even deeper. Our treatment is gentle on the surface and targets the metal molecule itself rather than burning away your pool’s finish.

How long does it take to remove rust from pool plaster?

Results usually start within hours, with full removal in 2 to 7 days.

You will often see light rust stains vanish or significantly fade within the first 2–6 hours of application.

Deep/Old Stains: For stubborn or widespread rust (like hundreds of staples or nails), the process typically takes 5–9 days to fully dissolve the metal.
Total Process: We recommend a 7-day cycle to ensure the metals are completely removed from the water. Best of all, the pool is usually safe for swimmers just 7 days after the treatment begins.

Are your products safe on all pool surfaces?

Our powerful rust stain it can be used on all pool surface types. These include:

Plaster
Fiberglass
Marcite
Quartz
Beadcrete
Pebbletec
Vinyl

Because the product has no chlorine or bleaches, it is safe to use on all pool surfaces.

Remove metals from pool water

For most rust spots, the dissolved metal content remaining after our treatment is negligible, meaning additional metal removal is unnecessary. However, if you are treating widespread staining, we recommend following up with CuLator Metal Eliminator.

CuLator is unique because of its ability to physically capture and remove copper and iron. After our treatment, your local pool store can test your metal (copper/iron) levels—don’t be surprised if they return a result of zero.

Our rust kit includes our Scale and Stain Eliminator designed to sequester metals and trap them in your filter. Because the metals are captured and removed during the filtration cycle, most pools won’t need any metal removal products.

Are my rust stains from Rebar?

Rust stains from reinforcing steel within the pool structure are not caused from metal objects. These appear randomly anywhere in the pool, often on the pool walls. They have the following traits:

NOTE: LESS THAN 5% OF RUST STAINS ARE CAUSED BY RUSTING REINFORCING STEEL. CALL US TO CHECK WITH NO COST OR OBLIGATION.

Contaminates in Pebbles

Fewer than 2% of rust stains in concrete pools stem from tiny metal fragments or contaminated pebbles mixed into the aggregate. Typically, these fragments originate from the metal rollers used to grind the pebbles into a consistent size during production.

Additionally, some contaminated pebbles with high mineral content can gradually release minerals, causing brown stains that sometimes leave faint trails (about 1/8 inch wide). These stains often emerge soon after a pool is filled with water and may increase in specific spots over time. Our treatment method speeds up the oxidation (rusting) process, effectively breaking down and eliminating the rust stains.

If you have dozens of tiny rust spots in a new pool that seem to be coming from nowhere, then this is likely the cause.

What causes rust spots on pool walls?

If your rust stain hasn’t come from a metal object that has fallen into the pool, then it may have come from the rebar used in the pool structure. Often, this type of staining will keep growing over time as it’s coming from the steel (rebar) used as part of the pool’s structure to maintain strength. Remember, this type of rust stain is uncommon, and it differs from normal rust stains because it continues to look worse over the life of the pool (see pictures).

Remember, this type of rust stain needs to be physically drilled out, plugged, and sealed to stop the steel from reacting (rusting) with the water. To repair this problem colored epoxy products designed for use in swimming pools plug the hole. No stain remover products permanently fix this issue.

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