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The Best In The Swim Shock of 2023 – Reviewed and Top Rated

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SaleRank No. #1

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 24 X 1 Pound

Fast-Acting Algae Control: Calcium Hypochlorite (Cal-Hypo) is an effective non-stabilized chlorine shock treatment, ideal for routine maintenance in your swimming pool
Versatile Use: Suitable for above ground or in-ground swimming pools, spas, and hot tubs; Pre-dissolve or dilute to avoid bleaching the liner
High Chlorine Content: 65% available chlorine, provides powerful sanitization for crystal-clear water
Easy Application: Pre-dissolve or dilute to avoid bleaching swimming pool liners; Spread granules in the deepest part of the pool; Brush if needed
Dosage: Use 1 Pound per 10,000 gallons weekly to maintain 5-10 ppm chlorine levels

Rank No. #2

In The Swim Chlorine-Free Pool Shock – Quick Dissolving, Fast-Acting, Shock-Oxidizer for Swimming Pools, Spas, and Salt Chlorinated Pools Compatible - 12 x 1 Pound Bags

Non-Chlorine Alternative: Use chlorine-free pool shock-oxidizer weekly to eliminate non-living matter, keeping your above ground or in-ground swimming pool water clean and safe
Proper Water Balance: Quickly dissolves to provide fast results without raising or altering pH levels
Reduce Chlorine Usage: Enhances the effectiveness of the existing chlorine in the pool, reducing the need for extra chlorine in your swimming pool
Advantage: Minimizes skin and eye irritation from your swimming pool water
Versatile Compatibility: Suitable for standard chlorine, salt chlorinated, mineral, and bromine-treated swimming pools, spas, and hot tubs

SaleRank No. #3

In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds

Cleaner, Safer Water: Our chlorine tablets remove bacteria, algae, and other organic contaminants to ensure your above ground or inground swimming pool stays clean and clear throughout the entire season
Powerful Sanitization: 99% Trichloro-S-Triazinetrione with 90% stabilized chlorine. Tablets do not expire and are non-perishable, but best used within 2 years of manufacture.
Long-Lasting Protection: Slow-dissolving to ensure consistent chlorination. Perfect for use in floaters or automatic feeders
UV Protected: Sun-stabilized to resist depletion from harmful UV rays
Usage: Ideal size for floaters or automatic feeders

SaleRank No. #4

In The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast Dissolving, pH Balanced Sanitizer - 56% Available Chlorine, 99% Sodium-Dichlor – 25 Pound

Versatile: Granular chlorine with the ability to be used in all types of swimming pools, spas, fountains, and water features.
Powerful Sanitizer: Sodium Dichlor shock removes bacteria, breaks down organic contaminants, and eliminates algae.
Calcium-Free Formula: Perfect for hard water areas—keeps pool water sparkling clean and crystal clear.
Stabilized Chlorine: Contains 56% available chlorine for effective, long-lasting sanitation.
Usage Directions: Add 3 oz. per 10,000 gallons for routine chlorination; use 21 oz. per 10,000 gallons for super chlorination

SaleRank No. #5

In The Swim Chlorine and Shock Bundle for Sanitizing Swimming Pools – Includes 50 Pound Bucket of 3 Inch Stabilized Chlorine Tablets and 50 Pound Bucket of 68% Cal-Hypo Pool Shock

Long-Lasting Chlorination: 99% Trichlor tablets with 90% available stabilized chlorine dissolve slowly for consistent, UV-protected sanitation.
Bundle Includes: (1) 50lb bucket of 3-inch Chlorine Tablets and (1) 50lb bucket of Calcium Hypochlorite (Cal-Hypo)
Powerful Shock Treatment: 68% Cal-Hypo formula targets and eliminates algae, bacteria, and contaminants fast.
Clear & Protected: Cal-Hypo provides immediate clarity while tablets maintain lasting water cleanliness.
NOTE: This bundle will likely ship in multiple packages, which may come from different locations and arrive on separate days. Please allow an extra day or two for all items to be delivered.

Last update on 2025-09-09 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What chemicals are in pool shock?

A: Pool shocks can be chlorine or non-chlorine-based. Chlorine-based pool shocks include calcium hypochlorite, commonly referred to as Cal-Hypo, Lithium Hypochlorite, and dichloroisocyanuric acid, more commonly referred to as Di-Chlor. Non-chlorine-based pool shock is made from potassium monopersulfate.

Q: What does shocking a pool do?

A: Shocking a swimming pool is the process of adding a large dose of chlorine to the water, killing bacteria and bringing the pool’s free chlorine levels up into the desired range. Shocking a pool also kills any algae that may be growing in it.

Q: When should you shock pool?

A: The best time of day to shock pool is when the sun is down. So, experts recommend shocking your pool in the evening or at night, to make sure it does its job.

Q: Where can I buy Pool shock?

A: You can also find swimming pool shock in many home centers and retail stores these days. You can find swimming pool shock in large home centers such as Home Depot and Lowes. You can find swimming pool shock, both powdered and liquid in other retails stores such as Target, Wal-Mart and even in some large supermarkets.

In The Swim Shock