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10 Best in the swim calcium in the US
Best Choice1
In The SwimIn The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 50 Pounds
9.8
Exceptional
Our Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
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Value for Money2
In The SwimIn The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast Dissolving, pH Balanced Sanitizer - 56% Available Chlorine, 99% Sodium-Dichlor – 40 Pound
9.5
Excellent
Our Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
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3
In The SwimIn The Swim Calcium Hardness Increaser for Swimming Pools - Fast-Acting, Scale Prevention - 94% Calcium Chloride - 45 Pounds
4
SpaGuardSpaGuard Spa Calcium Hardness Increaser - 12 Ounce
9.1
Excellent
Our Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
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5
Pool MatePool Mate 1-2825B Pool Calcium Increaser, 25-Pounds (Bag)
6
CloroxCLOROX Pool&Spa Calcium Hardness Increaser, Prevents Corrosion, Etching and Staining, 4LB
8.8
Very Good
Our Rating
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
More info
7
ADIOS!ADIOS! Hot Tub Hard Water Calcium Remover with Scale and Stain Clarifier, Soften Treat and Reduce Spa Deposits - Quart (32 oz)
8.5
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
8
In The SwimIn The Swim Instant Liquid Chlorine for Swimming Pool – Removes Harmful Contaminants – 73% Calcium Hypochlorite – (4) 1 Pound Containers
8.3
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9
In The SwimIn The Swim Super Pool Shock Swimming Pool Sanitizer - Fast Dissolving, Non-Stabilized - 70% Available Chlorine - 6 x 1 Pound Bags
8.2
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
10
RobelleRobelle 2808B Calcium Increaser, 8-Pounds, White
8.1
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
