Best Pool Algaecides Updated May 2025
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Best Pool Algaecides
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
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Best Pool Algaecide

10.0

1

10.0

Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)
Functionality
Algae control
Water clarity
Ease of use
Quality
Save 20%
Save 20%
Best Pool Algaecide

10.0

1
Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)
Functionality
Algae control
Water clarity
Ease of use
Quality
Save 20%

9.9

2

9.9

Pool RX 101001 6 Month Algaecide Blue Treats 7.5k-20k gallons, Single, Unit
Functionality
Algae removal
Water clarity
Chlorine use
Sparkle
Cleanliness
Save 21%
Save 21%

9.9

2
Pool RX 101001 6 Month Algaecide Blue Treats 7.5k-20k gallons, Single, Unit
Functionality
Algae removal
Water clarity
Chlorine use
Sparkle
Cleanliness
Save 21%
Best Value

9.6

3

9.6

Clorox® Pool&Spa™ Swimming Pool Algaecide, Prevents and Treats Pool Algae, Non-Foaming, 1 Quart (Pack of 1)
Functionality
Algae removal
Appearance
Ease of use
Pool use
Save 20%
Save 20%
Best Value

9.6

3
Clorox® Pool&Spa™ Swimming Pool Algaecide, Prevents and Treats Pool Algae, Non-Foaming, 1 Quart (Pack of 1)
Functionality
Algae removal
Appearance
Ease of use
Pool use
Save 20%
Popular

9.4

4

9.4

Clorox Pool&Spa XTRABLUE 3” Chlorinating Tablets, Individually Wrapped, Kills Bacteria & Stops Algae (5 LB)
Sheerness
Easy to use
Longevity
Value for money
Popular

9.4

4
Clorox Pool&Spa XTRABLUE 3” Chlorinating Tablets, Individually Wrapped, Kills Bacteria & Stops Algae (5 LB)
Sheerness
Easy to use
Longevity
Value for money

9.2

5

9.2

PoolRX+ pool unit 7.5k-20k gallons
Functionality
Water clarity
Algae control
Cleanliness
Chlorine use
Ease of use
Save 29%
Save 29%

9.2

5
PoolRX+ pool unit 7.5k-20k gallons
Functionality
Water clarity
Algae control
Cleanliness
Chlorine use
Ease of use
Save 29%
Premium Pick

9.1

6

9.1

Pool RX 101066 6 Month Algaecide Treats 20k-30k gallons, Black
Functionality
Algae removal
Water clarity
Use of chemicals
Cleanliness
Ease of use
Save 32%
Save 32%
Premium Pick

9.1

6
Pool RX 101066 6 Month Algaecide Treats 20k-30k gallons, Black
Functionality
Algae removal
Water clarity
Use of chemicals
Cleanliness
Ease of use
Save 32%

9.0

7

9.0

HTH 42052W Pool Care 3" Chlorine Tabs Advanced, Individually Wrapped Tablets - Swimming Pool Sanitizer with Clarifier & Algaeci...
Works well
Value for money
Sanitization
Chlorine level
Individual wrapping
Longevity
Save 18%
Save 18%

9.0

7
HTH 42052W Pool Care 3" Chlorine Tabs Advanced, Individually Wrapped Tablets - Swimming Pool Sanitizer with Clarifier & Algaeci...
Works well
Value for money
Sanitization
Chlorine level
Individual wrapping
Longevity
Save 18%

8.9

8

8.9

Copper Pool Algaecide for Swimming Pool - 90 Day Algaecide for Inground Pool to Prevent and Remove Pool Algae - Super Algaecide...
Water clarity
Product quality
Value for money

8.9

8
Copper Pool Algaecide for Swimming Pool - 90 Day Algaecide for Inground Pool to Prevent and Remove Pool Algae - Super Algaecide...
Water clarity
Product quality
Value for money

8.8

9

8.8

In The Swim Algaecide 60 Plus for Swimming Pools - Non-Metallic, Low Odor, Non-Foaming Algae Bloom Preventative - Chlorine Sani...
Functionality
Algae control
Value for money
Water clarity
Cleanliness
Ease of use
Save 10% + 10% Coupon
Save 10% + 10% Coupon

8.8

9
In The Swim Algaecide 60 Plus for Swimming Pools - Non-Metallic, Low Odor, Non-Foaming Algae Bloom Preventative - Chlorine Sani...
Functionality
Algae control
Value for money
Water clarity
Cleanliness
Ease of use
Save 10% + 10% Coupon

8.6

10

8.6

SeaKlear 90-Day Algae Prevention & Remover, 1 Qt
Functionality
Algae removal
Water clarity
Longevity
Pool protection
Save 14%
Save 14%

8.6

10
SeaKlear 90-Day Algae Prevention & Remover, 1 Qt
Functionality
Algae removal
Water clarity
Longevity
Pool protection
Save 14%

Our Top Choice

Best Pool Algaecide

10.0

1

10.0

Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)
Functionality
Algae control
Water clarity
Ease of use
Quality
Save 20%
Save 20%
Best Pool Algaecide

10.0

1
Clorox® Pool&Spa™ XTRABLUE® Plus Swimming Pool Algaecide, All-in-One Algae Killer, Non-Foaming, 40 Ounce (Pack of 1)
Functionality
Algae control
Water clarity
Ease of use
Quality
Save 20%
Related Categories
Pool ClarifierPool AlgecideChlorine Tablets for PoolsPool Shock3-Inch Chlorine TabletPool Stain Remover
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Related Categories
Pool ClarifierPool AlgecideChlorine Tablets for PoolsPool Shock3-Inch Chlorine TabletPool Stain Remover
Related Categories
Pool ClarifierPool AlgecideChlorine Tablets for PoolsPool Shock3-Inch Chlorine TabletPool Stain Remover