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Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)
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Purchase options and add-ons
Brand | CLOROX POOL & Spa |
Item Weight | 2.5 Pounds |
Item Form | Liquid |
Product Benefits | Kills and prevents various types of algae, ensuring clean and clear pool water |
UPC | 810821028820 810821021678 |
About this item
- All-in-One Algae Killer: Clorox Pool&Spa XtraBlue Swimming Pool Algaecide kills algae in just 24 hours. This fast-acting treatment effectively eliminates pool algae, ensuring your pool remains clean and clear.
- Kills and Prevents All Pool Algae: This product quickly and effectively eliminates green, mustard, and black pool algae, providing comprehensive protection and ensuring a clean and algae-free swimming environment.
- Non-Staining and Non-Foaming: Our XtraBlue Swimming Pool Algaecide features a preventative, non-foaming formula that fights algae growth before it starts.
- Salt Pool Compatible: This product treats up to 25,000 gallons and is suitable for all pool types, including salt pools. Its patented, non-staining formula ensures compatibility and effectiveness, allowing you to spend less time maintaining and more time enjoying your swimming pool.
- Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.
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From the manufacturer

For Green, Mustard & Black Pool Algae
Kill and prevent green, mustard and black pool algae fast with XtraBlue Algaecide--the ultimate algaecide solution. This patented, all-in-one formula won't stain surfaces and is safe for all pool types--including saltwater pools.
Clears Algae in 24 Hours
Fast-acting treatment kills all types of pool algae.
Ultimate Algaecide Treatment
Preventative, non-foaming formula fights algae before it starts.
Salt Pool Compatible
Patented, non-staining formula is suitable for all pool types, including saltwater pools.
Maintain Algae-Free Water
Weekly-Use
Use weekly as part of a regular maintenance routine.
Brush & Clean
Brush surfaces weekly to remove dirt and debris that may cause algae.
Test Weekly
Your pool chemistry can change quickly. Test your pool water weekly to ensure your chlorine and pH remain within optimal swimming levels.

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Videos
Videos for this product
0:54
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ANY GOOD??? Clorox Pool & Spa XtraBlue ALGAECIDE 40 oz
Eric Muathe
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Review of Clorox Xtra Blue Algae Helper
⭐ Mays' Healthy Lifestyle ⭐
Videos for this product
0:18
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Protect and keep your pool algae free all season long.
Wendi Wagers
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0:56
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How to Prevent and Kill Pool Algae
Bio-Lab, Inc.
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0:53
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Clorox Pool&Spa XtraBlue Algaecide
Bio-Lab, Inc.
Product information
Brand | CLOROX POOL & Spa |
---|---|
Item Weight | 2.5 Pounds |
Item Form | Liquid |
Product Benefits | Kills and prevents various types of algae, ensuring clean and clear pool water |
UPC | 810821028820 810821021678 |
Global Trade Identification Number | 00810821021678 |
Number of Items | 1 |
Unit Count | 40.0 Fluid Ounces |
Product Dimensions | 3.69 x 3.69 x 10.31 inches |
Item Weight | 2.5 pounds |
Manufacturer | Chem Lab Products, Inc. |
ASIN | B00PZZFL9K |
Country of Origin | USA |
Item model number | 44340CLX |
Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #9,867 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #15 in Swimming Pool Algaecides |
Is Discontinued By Manufacturer | No |
Warranty & Support
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Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)
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Product Description
Clorox® Pool&Spa™ XtraBlue® Algaecide is the ultimate algaecide solution to kill and prevent all types of pool algae - including swampy green algae, slippery mustard algae, and tough, stubborn black algae. This non-foaming, non-staining treatment clears algae in 24 hours and works great in all pool types. Use as a preventative algaecide weekly if your pool is prone to algae or when the temperature increases during the peak of summer. Always apply chemicals according to label directions. Circulating pool water when applying chemicals helps disperse chemicals throughout the pool for maximum coverage.
Compare with similar items
This Item CLOROX POOL & Spa Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1) | Recommendations | |||||
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | $27.14$27.14 | -11% $25.20$25.20 List: $28.20 | $28.48$28.48 | $29.99$29.99 | $69.26$69.26 | -35% $18.07$18.07 List: $27.99 |
Delivery | Get it as soon as Monday, Mar 10 | — | Get it as soon as Monday, Mar 10 | Get it as soon as Monday, Mar 10 | Get it Mar 10 - 11 | Get it as soon as Monday, Mar 10 |
Customer Ratings | ||||||
Sold By | Amazon.com | In The Swim Pool Supplies | Amazon.com | MAV Aqua Doc | Doheny's Pool Supplies Fast | Amazon.com |
form | Liquid | Liquid | Liquid | Liquid | Gel | Liquid |
Important information
Add the algaecide to your pool water, ensuring even distribution. Follow the dosage instructions on the label for your specific pool size.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers appreciate the product's functionality, algae control, and water clarity. They find it works well in clearing up algae and keeping their pool sparkling clear. Many customers find it simple to use and follow the directions correctly. However, some have mixed opinions on value for money and color.
AI-generated from the text of customer reviews
Customers like the product's functionality. They say it works well and quickly in clearing and maintaining pool water all season long. Some mention it works pretty well for controlling black algae.
"...this is the best pool item you can purchase to keep your pool looking great with no odor...." Read more
"This product worked very well in my pool...." Read more
"Gt the job done, very quality clorox is the way to go. For all your pool needs." Read more
"Works as expected - I try and buy local but 4 x markup is too much!" Read more
Customers are satisfied with the algae control. They say it clears up algae quickly and prevents it from forming. Some mention it works better than HTH algaecide.
"simple to use product that clears algae and keeps your pool sparkling clear. this product is the BEST...." Read more
"...It works great in keeping algae from forming. The recommended amount is only 1.5 fl oz per 10k gallons...." Read more
"Will kill algae. best used in water." Read more
"The Clorox XtraBlue Algaecide effectively tackled the algae in my pool within days. I love that it’s non-foaming, making it easy to use...." Read more
Customers appreciate the product's ability to clear and keep their pool water sparkling clear. They say it makes the water crystal clear and blue again in 24 hours.
"simple to use product that clears algae and keeps your pool sparkling clear. this product is the BEST...." Read more
"This product worked very well in my pool. Immediately cleared the water, but did have to scrub a few times and for sure redo the treatment after..." Read more
"Will kill algae. best used in water." Read more
"...I add a 2 ounce maintenance dose once each weekend and the water stays crystal clear without any algae build up at all. So very happy I switched!!..." Read more
Customers find the product easy to use and maintain. They mention it's simple to follow the directions, and their pool has never been this easy to maintain.
"simple to use product that clears algae and keeps your pool sparkling clear. this product is the BEST...." Read more
"...I love that it’s non-foaming, making it easy to use...." Read more
"...It is simple to use. You just pour in the recommended amount and watch the algae disappear when your filter pump is running...." Read more
"Since using Clorox pool products my pool has never been this easy to maintain. Highly recommend them ALL!" Read more
Customers like the product. They say it works well, is solid, and terrific.
"...Overall, a solid product that gets the job done!" Read more
"Gt the job done, very quality clorox is the way to go. For all your pool needs." Read more
"This stuff is terrific. Have had a problem with black algae in our near 50year old pool. Tried EVERYTHING! Shocked, brushed, etc...." Read more
"Fast shipping, fair price on a quality product" Read more
Customers have different views on the product's value for money. Some find it worth the cost and needs less product than pool store brands, making it less expensive overall. Others say it's not worth the money, too expensive, and doesn't remove green algae as advertised.
"...have been using for the past 2 years and very well worth the money spent...." Read more
"Best product on the market! May seem A bit pricey, however 1.5 oz per week, with a gallon of liquid chorine shock, is all I really use weekly...." Read more
"...The price was right so I read many reviews for pros and cons but have trusted the Clorox brands for other parts in my life, so why not try?!..." Read more
"...This Clorox product is BY FAR the best I’ve used. It is also cheaper than many of the others as well...." Read more
Customers have mixed opinions about the color of the product. Some say it turns hair green, but their pool goes from green to blue in 24 hours. Others mention that the pool remains green and black, with residual green on the sides and step area.
"Highly recommend this product because your pool goes from green to blue in 24 hours!" Read more
"...clear water, but after several brushings there was still residual green on the sides and the step area...." Read more
"Kills some algae, copper based, not good for mechanicals, turns hair green. Do your research for alternative algaecide." Read more
"Wow, was green and black, could not see bottom...." Read more
Reviews with images

Works if pool is balanced
Top reviews from the United States
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- Reviewed in the United States on September 10, 2023Style: XtraBlue AlgaecideVerified Purchasesimple to use product that clears algae and keeps your pool sparkling clear. this product is the BEST. with record heat this summer this product will get rid of your. algae and keep your pool looking great. Don't spend a bunch of money on different algaecide products to get rid of any algae you may have. this one product will take care of it. use initial dose and then around 8 to 10 ozs. weekly and your pool will always look great and you'll be saving money in the long run. I tried so many different products and a ton of money and nothing worked as good as this product. this is the best pool item you can purchase to keep your pool looking great with no odor. have been using for the past 2 years and very well worth the money spent. you will save in the long run using this product plus it is the best out there.
- Reviewed in the United States on July 16, 2024Style: XtraBlue AlgaecideVerified PurchaseI mainly use this product with my weekly maintenance routine. It works great in keeping algae from forming. The recommended amount is only 1.5 fl oz per 10k gallons. If your pool is well maintained, this can go along way.
If you’re having algae problems, this will help, but as specified in the directions, it’s important to have the other chemicals balanced to get the most out of this product, especially PH and chlorine. It’s also important to understand that using this and shock at the same time renders both of them useless.
I recommend going to a local pool store and getting the water digitally tested. This will help get everything balanced and the water clear again. I would not simply expect clear water in 8hrs, as advertised. If there are other underlying issues, this could take several treatments and other chemicals, or there could issues with your filters.
I mainly use this product with my weekly maintenance routine. It works great in keeping algae from forming. The recommended amount is only 1.5 fl oz per 10k gallons. If your pool is well maintained, this can go along way.
If you’re having algae problems, this will help, but as specified in the directions, it’s important to have the other chemicals balanced to get the most out of this product, especially PH and chlorine. It’s also important to understand that using this and shock at the same time renders both of them useless.
I recommend going to a local pool store and getting the water digitally tested. This will help get everything balanced and the water clear again. I would not simply expect clear water in 8hrs, as advertised. If there are other underlying issues, this could take several treatments and other chemicals, or there could issues with your filters.
Images in this review
- Reviewed in the United States on August 12, 2024Style: XtraBlue AlgaecideVerified PurchaseThis product worked very well in my pool. Immediately cleared the water, but did have to scrub a few times and for sure redo the treatment after the 72 hours as recommended. I also turned up the running time on my filter and have not had any further problems with algae.
- Reviewed in the United States on December 10, 2024Style: XtraBlue AlgaecideVerified PurchaseWill kill algae. best used in water.
- Reviewed in the United States on October 22, 2024Style: XtraBlue AlgaecideVerified PurchaseThe Clorox XtraBlue Algaecide effectively tackled the algae in my pool within days. I love that it’s non-foaming, making it easy to use. The only downside was needing more than I anticipated for my pool size, so it may not last as long. Overall, a solid product that gets the job done!
- Reviewed in the United States on October 10, 2024Style: XtraBlue AlgaecideVerified PurchaseGt the job done, very quality clorox is the way to go. For all your pool needs.
- Reviewed in the United States on July 23, 2024Style: XtraBlue AlgaecideVerified PurchaseI had the filter fail while I was out of town. The pool quickly turned into a swamp. Treated the pool with this two times and it cleared right up.
- Reviewed in the United States on October 14, 2024Style: XtraBlue AlgaecideVerified PurchaseAll of my experiences with Clorox® Pool&Spa™ products have been perfect!