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10 bestAlgaecidesof December 2025

112M consumers helped this year.

7% off

1

Clearwater CH0009 Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pristine Crystal Clear Water, 1 Litre
Clearwater CH0009 Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pristine Crystal Clear Water, 1 Litre

Clearwater

9.9

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2

envii Algae Klear Xtra – Blanket Weed Treatment for Ponds, Removes Blanket weed & String Algae Working All Year Round, Safe for all Fish & Plants – 500ml Treats 10,000 litres
envii Algae Klear Xtra – Blanket Weed Treatment for Ponds, Removes Blanket weed & String Algae Working All Year Round, Safe for all Fish & Plants – 500ml Treats 10,000 litres

envii

9.8

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3

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

9.7

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4

Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (5 Litres)
Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (5 Litres)

Pro-Kleen

9.6

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5

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

9.4

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Related productsUp to 9% off

Desjoyaux Pools Algaecide Algae Remover For Swimming Pools and Hot Tubs Water Treatment - Premium Grade Chemical Treatment 5L

Desjoyaux Pools Algaecide Algae Remover For Swimming Pools and Hot Tubs Water Treatment - Premium Grade Chemical Treatment 5L

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Bluewater 2ltr Longlife Algaecide - Swimming Pool Chemicals

Bluewater 2ltr Longlife Algaecide - Swimming Pool Chemicals

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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

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Blue Horizons SWIMMING POOL 5L LONG LIFE ALGAECIDE WINTERISER WINTER TIME TREATS 15000 GALLONS

Blue Horizons SWIMMING POOL 5L LONG LIFE ALGAECIDE WINTERISER WINTER TIME TREATS 15000 GALLONS

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6

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

Bluewater Pool & Spa Chemicals

9.2

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6% off

7

Clearwater CH0006 Algaecide Algae Remover for Swimming Pool and Spa Hot Tub Water Treatment, Highly Effective Formula, 1 Litre
Clearwater CH0006 Algaecide Algae Remover for Swimming Pool and Spa Hot Tub Water Treatment, Highly Effective Formula, 1 Litre

Clearwater

9.0

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8

CUQOO Multifunction 4 in 1 Chlorine Tablets for Swimming Pool & Hot Tub – Slow Releasing & UV Resistant - Sanitiser, Stabiliser, Algaecide & Clarifier - Water Cleaning Premium Pool Tablets
CUQOO Multifunction 4 in 1 Chlorine Tablets for Swimming Pool & Hot Tub – Slow Releasing & UV Resistant - Sanitiser, Stabiliser, Algaecide & Clarifier - Water Cleaning Premium Pool Tablets

CUQOO

8.8

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7% off

9

Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (10 Litres)
Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (10 Litres)

Pro-Kleen

8.5

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10

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

Blue Horizons

8.3

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