10 bestWinterizing Pool Chemicalsof January 2026
112M consumers helped this year.
1
Blue Horizons 5L WINTER TIME LONG LIFE ALGAECIDE WINTERISER (Treats 15,000 gallons) UK
Blue Horizons
9.9
2
Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (5 Litres)
Pro-Kleen
9.8
3
FILO Sodium Hypochlorite 20L (4X5L) - High Strength (14-15%) Brick, Driveway & Patio Cleaner - Liquid Chlorine Shock Treatment, for Swimming Pools & Hot Tubs - Stain Removal and Paving Algae Control
FILO
9.7
4
Bluewater 5ltrs Longlife Algaecide - Swimming Pool Chemicals
Bluewater Pool & Spa Chemicals
9.6
7% off
5
Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (10 Litres)
Pro-Kleen
9.4
Other
SeaKlear AquaPill AP71 WinterPill Swimming Pool Winterizer Pill, Translucent Light Yellow, Pack of 1
Pro-Kleen Swimming Pool Algaecide Winteriser Chemical (20 Litres)
KLEEN POOL ALGAECIDE LONGLIFE SWIMMING POOL ALGICIDE 1 LITRE - No.1 for the ultimate crystal clear water all year round.
Special Winter Treatment for Swimming Pools HTH - Super Winterprotect - 3L
6
Blue Horizons Ultimate Winter Time Algaecide - Tub of 5 Litre
Blue Horizons
9.2
9% off
7
Blue Horizons SWIMMING POOL 5L LONG LIFE ALGAECIDE WINTERISER WINTER TIME TREATS 15000 GALLONS
Blue Horizons
8.9
9% off
8
Blue Horizons BWP105-5 Ultimate Winter Time Algaecide, 5 L
Blue Horizons
8.7
9
SeaKlear AP75-02 15K Winterpill Pool Closing Chemical, 2-Pack, White
Robelle
8.5
10
Kleen Pool Algaecide Swimming Pools Algicide Treats 28,000 Litres Lasts 6 Months
KLEEN POOL
8.2
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