Top 10 Best pool algaecide for inground pool in 2026

Last Updated - 6/7/2026

🏆Best Choice

Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Pool Algae Treatment: Our Pool Algaecide and Clarifier is specially formulated to treat existing algae while providing long-lasting defense against stubborn growth, ensuring that your pool remains clear and algae-free for an extended period of time.
•Maintain Crystal Clear Water: Kills and prevents all types of swimming pool algae (green, mustard, black algae) for crystal clear swimming pool water.
•Non-Foaming Formula: Spend less time maintaining and more time enjoying your pool with this Swimming Pool Algaecide and Clarifier, which features a non-foaming formula.
•Suitable for Use in All Types of Pools: This product is proven to meet the needs of every pool owner, as it is compatible with all types of pools, including saltwater pools. You can trust our product to deliver exceptional performance and keep your pool water clean and clear.
•For best results, add to the deepest end of the pool with the filter running. Circulating pool water when applying chemicals helps disperse chemicals throughout the pool for maximum coverage
•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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$14.88

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Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool Algaecide, Prevents and Treats Pool Algae, Non-Foaming, 1 Quart (Pack of 1)

9.6

ChoiceComparer.com Score

9.6

/ 10

Outstanding

Main highlights

•Fast-Acting Algae Treatment: Clorox Pool & Spa Swimming Pool Algaecide helps prevent and treat green pool algae quickly and controls algae growth in pools keeping it crystal clear.
•Non-Foaming Formula: It effectively eliminates algae growth and offers longer-lasting protection for your pool without any foaming.
•Effective Kill & Preventative Treatment: Clorox Pool&Spa Swimming Pool Algaecide effectively kills existing algae and prevents future growth, ensuring a pristine pool environment.
•Suitable for All Pools: This non-foaming formula suits all types of pools, including saltwater pools.
•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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$17.89

$19.98

-10%

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HTH

HTH 67244 Swimming Pool Care Algae Guard Ultra - Long Lasting Formula, Eliminates & Prevents Green, Black, and Mustard Algae, Fast Acting & Effective Swimming Pool Chemical, 32oz

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•BENEFIT: Get long-lasting protection from extreme algae; This non-foaming algae control kills and prevents blooms of all algae types
•OUR STRONGEST ALGAE CONTROL: Kills, prevents and protects against regrowth of heavy green, black and mustard swimming pool algae for up to 3 months
•NON-FOAMING, FAST-ACTING: Add HTH Algae Guard Ultra directly to your swimming pool water and swim right away
•COMPATIBLE WITH ALL POOLS: This non-staining formula is great for all swimming pools including vinyl-lined and saltwater systems
•YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Algae Guard Ultra every 3 months; Works great with HTH Shock products

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$34.39

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In The Swim

In The Swim Algaecide 60 Plus for Swimming Pools - Non-Metallic, Low Odor, Non-Foaming Algae Bloom Preventative - Chlorine Sanitizer Compatible - 1 Quart

9.3

ChoiceComparer.com Score

9.3

/ 10

Excellent

Main highlights

•In The Swim Algaecide 60 Plus is perfect for preventing and controlling various types of algae including: green, yellow, black, and pink in your above ground or in-ground swimming pool.
•Algaecide 60 Plus is a non-metallic, non-foaming, low odor formula specially formulated for pools with attached spas, waterfalls, or decorative fountains.
•This product is pH tolerant which means it is effective in both acidic and alkaline pH ranges, thereby eliminating the need to alter pool chemistry prior to application.
•Works nicely for pools using well water. Compatible with various sanitizers such as chlorine, bromine, biguanide, and salt systems.
•We recommend and initial dosage of 6-11 ounces per 10,000 gallons, for standard maintenance 2-4 ounces per 10,000 gallons, and for visible algae 11-17 ounces per 10,000 gallons.

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$27.99

$30.99

-10%

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MAV AquaDoc

Copper Pool Algaecide for Swimming Pool - 90 Day Algaecide for Inground Pool to Prevent and Remove Pool Algae - Super Algaecide for Pool Opening - AquaDoc 32oz

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•90 day no algae guarantee - Conquer Pool Season with AquaDoc pool algaecide: Keep your swimming pool clear of algae with our Double Whammy Algaecide. What's the Double Whammy? Ideal for inground and above ground pools, it eliminates mustard, green, blue and black algae effortlessly.
•Unique, Non-foaming & Non-staining algaecide that removes & prevents algae for 3 months. This copper algaecide is the answer to properly removing algae from your pool.
•Unlike harsh chemicals, this unique formula attacks algae at its core, preventing regrowth for long-lasting results. Think of it as a super algaecide for pool with lasting power!
•Reduces the amount of chemicals needed in your pool by making your sanitizer more efficient. The superior copper algaecide.
•Made in the USA: Experience the AquaDoc difference with Double Whammy Algaecide. All pool chemicals from AquaDoc are proudly made in the USA and held to the highest quality standards.

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$27.97

$35.99

-22%

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In The Swim

In The Swim Super Algaecide for Above Ground or Inground Swimming Pools – Low Odor, Non-Foaming Preventative for Yellow/Mustard Algae in Swimming Pools - 7.1% Chelated Copper – 1 Quart

9.0

ChoiceComparer.com Score

9.0

/ 10

Great

Main highlights

•Effective Maintenance: Ideal for spring openings and routine care, reducing algae growth with a long-lasting copper-based formula
•Powerful Algae Control: Highly concentrated to eliminate yellow and mustard algae with small, easy-to-measure doses
•Stain Protection: Formulated with 23.5% copper triethanolamine and 7.1% chelated copper to prevent pool staining
•Swim-Ready Safety: Free of harmful chemicals, allowing immediate swimming after application
•User-Friendly Formula: Non-foaming, low-odor, and perfect for those sensitive to strong chemical smells

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$21.49

$24.49

-12%

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Coral Seas

Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs.

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Compatible with pools operating a chlorine generator
•Simple to use, requires no brushing, and cleans up algae gently without the use of harsh chemicals
•Used in conjunction with pool shock to safely remove green, yellow, brown, and pink algae from your pool
•Safe, non-toxic and can be used on all pool surfaces, including vinyl liners

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$17.60

$21.99

-20%

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Doheny's

Doheny's Super Algaecide Plus | Pro-Grade | Effective Against Most Algae Types | 7.1% Chelated Copper (Chelated to Reduce Staining) | Non-Foaming, No Clouding | Safe to Swim After Use | 40oz Bottle

8.7

ChoiceComparer.com Score

8.7

/ 10

Good

Main highlights

•Proudly Made in America – Powerful Algae Control: Trusted for over 50 years, Doheny’s family-owned brand delivers 7.1% chelated copper to reduce staining while providing long-lasting algae-fighting power.
•Effective & Swim-Safe: Controls most types of algae while being safe enough to swim immediately after use!
•Easy Dosage: Initial dose: 4 oz per 10,000 gallons. Maintenance dose: 2 oz per 10,000 gallons.
•Crystal Clear Water: Won’t foam or cloud your pool, ensuring clean and clear water in any climate.
•Buy in Bulk & Save! Stock up and get the best value for your pool maintenance needs.

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$19.16

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SeaKlear

SeaKlear 90-Day Algae Prevention & Remover, 1 Qt

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Reliable & Effective
•90-days no algae guarantee (when used according to instructions in balanced pool water)
•Kills and prevents blue-green, green, yellow and black algae
•Non-foaming, non-staining (when used according to instructions in balanced pool water)
•11.8% Copper Sulfate Pentahydrate; 3% Copper as elemental
•Effective against blue-green, black and mustard algae
•Nonstaining formula
•Each treatment will last three months
•Use 16 fluid ounce 10000-gallon of pool water to prevent algae growth in all pool types
•For severe algae treatment use 32 fluid ounce per 10000-gallon of pool water

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$23.99

$27.99

-14%

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