10 bestAlgaecidesof December 2025
112M consumers helped this year.
1
SpaChoice 472-4-8230-04 Sodium Bromide for Hot Tub, 2-Pounds, 4-Pack
SpaChoice
10.0
2
Ultimate Pool Closing & Opening Kit (3 Products incl. 50% Algae Concentrate)
Aqua Coastal
10.0
3
6 Pack of Multi-Shock by Pool Supplies Canada (450 g)
Pool Supplies Canada
10.0
4
HTH EXTRA HTH Extra Super Shock 6kg 30640
HTH EXTRA
9.8
5
BioGuard Polygard (3.78 L) Algae Preventer (SKU 3668)
BioGuard
9.5
Other
BioGuard Hibernate Closing Kit (Treats up to 80,000 L) (SKU 1092)
GLB 71205-SP-02BX Super Blue Pool Clarifier, 64-Ounces (Packaging May Vary)
HTH EXTRA HTH EXTRA Multi-Purpose Chlorinating Pucks l Genuine Product l Built in Algaecide! l Best in Quality Chlorine Pucks,6 KG
Copper Test Strips for Mineral Pools - Works with Pool Ionizers, Mineral Cartridges, Copper Sulphate and Copper Algaecides - Part CBI-Cut
6
Algae Shield Liquid Pool Algaecide (50% Strength) (Copper and Stain Free) (1L)
Aqua Coastal
9.3
7
Clean + Clear Minerals 3 kg Kills All Algae Naturally
C-Pool
9.0
8
Seachem Flourish Excel 500ml
Seachem
8.8
9
hth Pool Sanitizer 3" Chlorinating Tables 4-in-1 (42011)
HTH
8.5
10
3 Pack of Multi-Shock by Pool Supplies Canada (450 g)
Pool Supplies Canada
8.2
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