Best Swimming Pool Stain Removers of 2026

"I've tried several products for my saltwater pool, and this one has worked the best so far. Calcium is now under control, and I've actually noticed improvement on the tiles at the waterline. Plus, it's way more affordable than what my local pool store offers."

"I was concerned about white floating particles in my hot tub, but after using this, the scale was gone overnight. I even recommended it to a friend with rust stains in her indoor whirlpool, and she was really happy with the results. We always get the big bottle since it works so well."

"The product does what it's supposed to and is good value for the money. However, I wish the large bottle was easier to pour and measure from. Still, it's a solid purchase overall."

"I was amazed by how quickly this product removed years-old stains from my pool. I was initially worried when the stain turned black, but after leaving it alone for two days, both the black haze and the stain vanished. It's not easy to impress me, but this did the trick!"

"After trying several chemicals for yellow and brown stains, I decided to use this first. Within hours, my pool went from patchy yellow-brown to crystal clear blue. I followed up with Metal Out and the results were fantastic. If you're hesitant, don't be—this product works wonders!"

"I struggled with rust stains until I tried this. Using the sock method, I saw stains disappear in minutes. I didn't have to use much, and my pool looks perfect now. Highly recommend for anyone battling stubborn pool stains!"

"I can’t say enough about how Vanish turned my dark brown, stained well-water pool into crystal clear, bright blue water in just about an hour. I followed the instructions, used both canisters, and didn’t even have to vacuum – every stain was gone. As long as you follow the directions and balance your pH, the results are amazing. I’ll definitely keep buying this whenever I see metals in the water."

"Every season, my pool and steps would come out brownish after opening, and I usually just handled the steps with vitamin C tablets. This year, the stains were worse, but after using Vanish as instructed, my entire liner and steps were clean and clear by the afternoon. Even using half the recommended dose worked great for me."

"I tried this on my gunite pool after reading lots of positive reviews and following all the prep steps. Unfortunately, it didn’t remove my set-in metal stains at all, even after two applications and a lot of brushing. I plan to try ascorbic acid next, as this product didn’t work for my stubborn stains."

"I've tried countless solutions for metal stains and water clarity in my pool and spa, but nothing compares to the CuLator PowerPak 1.0. It's incredibly easy to use—just drop it in the skimmer or pump basket and let it do its job. My water is now pristine and crystal clear, and I don't have to worry about unsightly stains anymore. The fact that it lasts for months and saves money on constant chemical treatments is a huge plus. I can confidently say this product is an essential part of my pool maintenance routine."

"I was extremely skeptical at first, but the CuLator Power Pack turned out to be a game-changer for my iron-heavy water. After struggling for years and wasting money on other chemicals, this tiny pouch worked wonders—the green tint was gone overnight! The company’s customer support is top-notch; they helped me figure out the best way to use it with my unique setup. I won’t use anything else now, and I highly recommend it to anyone dealing with metal issues in their pool."

"My pool company suggested CuLator to remove iron, and I was blown away by the results. In just 24 hours, the greenish tint vanished and water clarity improved dramatically in my 15,000-gallon pool. This little pouch really delivers on its promise. I'm truly a believer now!"

"I was seriously considering giving up on my pool because of all the stains that just wouldn’t budge. After trying multiple products with no luck, I found this one and decided to take a chance. Within hours, I saw a dramatic improvement—about 85% of the stains vanished and the water looked inviting again. After a second treatment, my pool became absolutely crystal clear. I’m amazed by how well this worked and relieved I didn’t have to call in expensive pros. This is a must-have for anyone battling stubborn pool stains."

"When I set up my above-ground pool after winter, the liner was covered in stains. Based on positive reviews and the fact that it’s citrus-based, I gave this product a shot. It worked wonders—after following the directions, most stains disappeared within a day, and the rest faded after 48 hours. Now, my pool looks spotless. This product works quickly and effectively, and I’m very impressed!"

"Dealing with rust and metal stains on my white fiberglass pool was getting frustrating, especially after other products failed me. But Vanish really delivered. It took about 24 hours to work, but the stains disappeared completely—no scrubbing needed. I also appreciate the gentler citrus-based formula compared to harsher chemicals. If you’re struggling with staining, this is definitely worth trying!"

"I’ve used this product on my fiberglass pool multiple times, and it’s been exceptional for removing brown plating and restoring the vibrant blue color. Patience is key—the results aren’t always instant, but by following careful application steps, including treating stubborn areas and adjusting pH, my pool walls and steps looked brand new by the next day. This product is a miracle for pool stains."

"After opening my 25k gallon vinyl pool late, I ended up with a huge, ugly stain that wouldn’t budge despite scrubbing and pool chemicals. I tried this product as a last resort, followed the directions, and was amazed—the stain was completely gone within 24 hours. No hard work, no replacing the liner—just incredible results. Highly recommend following the instructions for the best outcome."

"I was skeptical at first, but after sprinkling this product around my pool, I returned to find a totally clear pool with metallic stains gone. Didn’t expect such a dramatic difference without much effort—recommended for metal stains if this product suits your pool’s needs!"

"I was amazed at how quickly this product removed the calcium buildup from our pool and spa walls. Living in the southwest, we constantly struggle with hard water and scale, but this solution melted away the stains in just one day. The water is now incredibly clear and feels much softer on my skin and hair. I only wish I had discovered it sooner!"

"This stain and scale treatment is exactly what my hot tub needed to get ready for winter. Since my local pool supply is closed, I had to shop online, and I'm glad I did—it's working perfectly and is compatible with both bromine and chlorine systems. My hot tub is looking fantastic!"

"If you follow the directions carefully, you'll see the scale and unsightly ring around the pool disappear after just a few days. It's very helpful for keeping the pool clean and well-maintained."

"I was struggling with stubborn metal stains that wouldn’t budge no matter how much I cleaned. Opting for this affordable stain remover over expensive brands, I was amazed—stains faded within a day and disappeared by week’s end. All I did was keep chlorine low and let it work. This product is now my go-to for a sparkling pool at a great price."

"After opening my vinyl-lined pool late and battling algae, I was left with a giant yellow-brown stain that wouldn’t come off, no matter how hard I scrubbed. Facing the cost of replacing the liner, I gave this product a shot. I followed the instructions, and to my surprise, the stain was completely gone after 24 hours. I’m honestly shocked at how well it worked—just follow the directions and watch your pool transform!"

"I read some negative reviews, but in my experience, this stuff is a miracle for pool stains. With a little patience and correct usage, I’ve used several bottles over the years and always had great results. Even tough, cocoa-brown plating comes off with careful application. My advice: don’t over-shock your pool, and trust the process—you’ll see your pool go from stained to stunningly blue."

"I'm really impressed with how quickly and efficiently this product removed stubborn scale from my pool surfaces. It was simple to use, gentle on my pool tiles and liner, and I didn't have to do much scrubbing. Plus, a single bottle lasted through multiple cleanings, so it's definitely a cost-effective solution. I trust Clorox for my pool care needs."

"As a first-time pool owner, I found this product great for balancing water hardness. It works especially well when paired with other Clorox Pool products and their test strips. While it didn't address all the stains, the ease of use and clear instructions made it perfect for beginners like me."

"After replacing my pool liner, I filled it with my extremely rusty well water. The water looked terrible, but after adding this product as directed, my pool became almost crystal clear within a day. A couple of filter backwashes and vacuuming later, my pool looked great. Now, I always keep this on hand for topping up with the hose. It's a must-have for dealing with iron-rich water."

"Whenever my pool turns green from metals in well water, I add this and within hours the water is sparkling clean again. It's incredibly effective for keeping my pool clear all summer."

"I tried this to deal with staining on my pool liner, but unfortunately, it didn't improve the light brown stains. It might just not be the right solution for my particular issue."