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10 bestPool Algaecidesof September 2025

112M consumers helped this year.

1

Blue Horizons 5L WINTER TIME LONG LIFE ALGAECIDE WINTERISER (Treats 15,000 gallons) UK
Blue Horizons 5L WINTER TIME LONG LIFE ALGAECIDE WINTERISER (Treats 15,000 gallons) UK

Blue Horizons

10.0

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2

Clearwater Algaecide Algae Remover for Swimming Pool and Spa Hot Tub Water Treatment, Highly Effective Formula, 1 Litre
Clearwater Algaecide Algae Remover for Swimming Pool and Spa Hot Tub Water Treatment, Highly Effective Formula, 1 Litre

Clearwater

10.0

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3

Desjoyaux Pools - Premium Grade Algaecide 5L – Long-Lasting Algae Prevention & Treatment for Swimming Pools, Hot Tubs & Spas – Powerful Pool Chemical for Clear Water, Prevents Green Algae Growth
Desjoyaux Pools - Premium Grade Algaecide 5L – Long-Lasting Algae Prevention & Treatment for Swimming Pools, Hot Tubs & Spas – Powerful Pool Chemical for Clear Water, Prevents Green Algae Growth

Desjoyaux

9.8

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4

Bluewater 5ltrs Longlife Algaecide - Swimming Pool Chemicals
Bluewater 5ltrs Longlife Algaecide - Swimming Pool Chemicals

bluewater POOL & SPA CHEMICALS

9.5

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5

Kleen Pool Algaecide Swimming Pools Algicide Treats 28,000 Litres Lasts 6 Months
Kleen Pool Algaecide Swimming Pools Algicide Treats 28,000 Litres Lasts 6 Months

KLEEN POOL

9.3

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Related productsUp to 11% off

Blue Horizons Longlife AlgiMAX Eliminator (2Ltr) Algae Prevention

Blue Horizons Longlife AlgiMAX Eliminator (2Ltr) Algae Prevention

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SUDS-ONLINE Algaecide For Simming Pools, Spa's Hot Tubs (500ml)

SUDS-ONLINE Algaecide For Simming Pools, Spa's Hot Tubs (500ml)

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Swimming pool Clean N Clear algaecide by Jacksons

Swimming pool Clean N Clear algaecide by Jacksons

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HTH Super Kleral – 3L

HTH Super Kleral – 3L

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6

Bluewater 2ltr Longlife Algaecide - Swimming Pool Chemicals
Bluewater 2ltr Longlife Algaecide - Swimming Pool Chemicals

bluewater POOL & SPA CHEMICALS

9.0

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14% off

7

Pro-Kleen Pool Algae Remover 5L - Removes & Prevents Algae Growth - High Concentration, Long-Lasting Professional Formula
Pro-Kleen Pool Algae Remover 5L - Removes & Prevents Algae Growth - High Concentration, Long-Lasting Professional Formula

Pro-Kleen

8.7

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14% off

8

Cleenly Pool Algae Remover - Removes & Prevents the Growth of Green in Water - Super Concentration and Long Lasting 5L
Cleenly Pool Algae Remover - Removes & Prevents the Growth of Green in Water - Super Concentration and Long Lasting 5L

Cleenly

8.5

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9

Blue Horizons Ultimate Winter Time Algaecide - Tub of 5 Litre
Blue Horizons Ultimate Winter Time Algaecide - Tub of 5 Litre

Blue Horizons

8.2

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9% off

10

Ultima-Plus XP Pool Algaecide - Removes Algae in Pools, Hot Tubs and Spas & Prevents Algae Regrowth - Suitable for all Pools (5 Litres)
Ultima-Plus XP Pool Algaecide - Removes Algae in Pools, Hot Tubs and Spas & Prevents Algae Regrowth - Suitable for all Pools (5 Litres)

ULTIMA-PLUS XP

7.9

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