9 Best Algae Killer For Swimming Pools - March 2026

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Last Updated: 03-03-2026

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

CLOROX Pool&Spa

9.8

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

CLOROX Pool&Spa

9.6

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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

MAV AquaDoc

9.5

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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

In The Swim

9.2

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Pool Mate 1-Quart Concentrated Black Algaecide, Algaecide for Pool, Made in USA

Pool Mate

9.1

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HTH 67084 Pool Care Algae Guard Advanced, All Algae Eliminator for Swimming Pools - Fast-Acting, Destroys & Prevents Green, Black & Mustard Algae, Keeps Pool Water Crystal Clear, 32 fl oz

HTH

8.8

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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

HTH

8.6

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Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)

CLOROX Pool&Spa

8.4

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In The Swim Black Algaecide – Eradicates Black Algae in Swimming Pools - Copper Sulfate Pentahydrate - 1 Quart

In The Swim

8.2

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