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

2,052 Reviews Scanned

Rank No. #1

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 Pound

Powerful chlorine shock treatment that is great for regular maintenance.
Quickly eliminates algae, bacteria, and other harmful contaminants from your pool water.
Main active ingredient is 68% Calcium Hypochlorite (Cal-Hypo) for quick sanitizing.
Dosage: 1 Pound per 10,000 gallons
Cal-Chlor granules can be used in swimming pools, spas and hot tubs. Must pre-dissolve/dilute to prevent bleaching of the liner.

SaleRank No. #2

In The Swim Chlorine Shock Granules for Sanitizing Swimming Pools – 56% Available Chlorine – Dichlor – 40 Pound Bucket Multicolor

In The Swim's granular chlorine is ideal for use in swimming pools, spas, fountains and water features
Powerful sanitizing powder that destroys bacteria, breaks down contaminants and kills algae
Calcium-Free formula keeps hard-water pools sparkling clean and crystal clear
Contains premium-quality 56% available stabilized chlorine
99% Sodium Dichloro-S-Triazinetrione Dihydrate

Rank No. #3

In The Swim Super Pool Shock 6 x 1 Pound Bags Multicolor

Whether you are an above ground or in-ground pool owner, In The Swim’s super shock sanitizer treatment is a powerful, fast-acting booster that is great for opening your swimming pool in the Spring season.
When confronted with stubborn algae, bacteria, and other harmful water contaminants that can cause illnesses, our In The Swim super shock treatment can rapidly restore your swimming pool back to an ultra-clear quality.
The main active ingredient is 73% Calcium Hypochlorite (Cal-Hypo), with a purpose of fighting chloramines that are responsible for the gases that create “pool smell” and can irritate your eyes, skin, and lungs.
This super shock treatment is an ideal product for your above or in-ground pool in the fight against those yellow and green algae blooms.
Proudly manufactured in the USA for over 40 years.

SaleRank No. #4

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

Our chlorine free pool shock-oxidizer comes in convenient 1 pound bags
Other applications and weekly maintenance will not affect other chemical levels.
Safe enough to swim right after application!
Use chlorine free pool shock-oxidizer on a weekly basis to shock non-living swimmer waste.
Dosage: 1 Pound per 10,000 gallons

Rank No. #5

In The Swim Di-Zap Multi-Shock 6 x 1 lb. Bags

Fast dissolving swimming pool cleanser
99% Sodium Dichlor
Stabilized - contains UV inhibitor to prevent chlorine burn-off
Ideal for all your water features such as pools, spas, and even fountains
Clears cloudy water fast

Rank No. #6

In The Swim Spa Care Spa Shock Oxidizer - Spa Chemicals for spa Sanitation F124002024AE

Powerful non-chlorine shock is long-lasting and dissolves completely.
Spa Shock should be used weekly to oxidize organic contaminants, reduce chlorine odor and increase water clarity.
Dosage: 2 ounces (1/4 cup) per 500 gallons weekly, or more often for heavy bather loads.
Great for use with mineral stick systems
Active ingredient: Persulphate compound

SaleRank No. #7

Clorox® Pool&Spa™ Shock XTRABLUE®2, Kills Bacteria & Algae in Swimming Pools, Swim-Ready in 15 Minutes, (6-Pack)

6 in 1 Formula: Kills bacteria and algae to maintain a clear swimming pool. Our algae-fighting formula prevents algae for crystal-clear water. Destroys contaminants to aid filter performance and clear dull, cloudy water
Swim-ready in 15 minutes: Fast dissolving formula works quickly so you can treat and swim in just 15 minutes.
Compatibility: This product is safe for all swimming pool surfaces, including vinyl, plaster, fiberglass, and tile.
Usage: Use 1 lb. per 12,000 gallon of water. Shock pool weekly and after heavy use, high temperatures, or rain.
Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common pool problems and get personalized product and dosage recommendations.

Rank No. #8

DryTec 1-1901-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack

One bag of this product per 10,000 gallons of water
Adjust and maintain pH at 7.2-7.6
Maintain total alkalinity in the range of 60 to 120
One bag of this product per 10,000 gallons of water provides 5 to 10 ppm available chlorine

Rank No. #9

HTH 52042 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 2 lb

BENEFIT: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity
FEATURES: Multi-functional shock treatment for weekly use; Use weekly to solve 90% of pool water problems within 24 hours
VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
YOU'RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

Rank No. #10

In The Swim Pool Super Opening Chemical Start Up Kit - Above Ground and In-Ground Swimming Pools - Up to 35,000 Gallons

Save time and take the guesswork out of measuring chemicals when opening your pool with our pre-measured pool opening kits.
(4) bags of 99% sodium dichlor (Di-Zap), which will get your pool water clean, clear, and safe to swim in.
Clarifier keeps your water crystal clear by coagulating dirt, which helps your filter be more efficient.
Algaecide works in conjunction with pool shock to defend against multiple types of algae from invading your swimming pool.
Sun sorb oil and scum absorber will soak up suntan oils, body oils, grime, and scum, keeping your water clear.

SaleRank No. #11

In The Swim Pool Closing Kit - Winterizing Chemicals for Above Ground and In-Ground Pools - Up to 7,500 Gallons

The In The Swim Pool Winterizing and Closing Chemical Kit is designed to save you time and money by including all the necessary chemicals to close your pool. Making for a simpler pool closing experience, and providing an easy transition for pool opening season come spring.
Unlike chlorine-based winter kits that reduce the effectiveness of other pool winterizing chemicals and can stain, bleach or damage pool surfaces, our chemical kits won't damage your pool during winter.
Designed for pools of all shapes and sizes. If your pool is between sizes we suggest you buy the next size up. You can buy multiple kits for pools larger than 35,000 gallons.
Made exclusively for In The Swim, the Winter Sorb can absorb up to 40 times its weight in residual suntan lotions and body oils to prevent grease, grime and waterline scum.
Kit Includes:1 Qt. Winterizer, 1 Qt. Winter Stain-Away, 1 Lb. Chlorine Free Pool Shock, 1 Winter Sorb, and 1 Winter Pool Floater

SaleRank No. #12

In The Swim Instant Liquid Chlorine for Swimming Pool – Removes Harmful Contaminants – 73% Calcium Hypochlorite – (4) 1 Pound Containers

Granular chlorine powder instantly transforms into liquid pool shock upon contact with water.
Versatile solution for spring openings, algae blooms, and regular pool maintenance.
Our liquid pool shock effectively eliminates chloramines, ensuring a safe and healthy swimming environment.
Containing 73% calcium hypochlorite, it efficiently eliminates harmful contaminants from your pool, leaving it clean and refreshing.
Safer to use, carry and store

Rank No. #13

In The Swim Super Algaecide for Above Ground or Inground Swimming Pools – Low Odor, Non-Foaming Preventative for Yellow/Mustard Algae in Swimming Pools - 7.1% Chelated Copper – 1 Quart

In The Swim Super Algaecide is great for spring openings and routine maintenance to your swimming pool to keep algae growth at a minimum. This formula is copper based vs quaternary, which lasts longer and prevents foaming.
This powerful and highly concentrated copper-based super algaecide is used to eradicate small, isolated blooms to control and prevent yellow or mustard algae growth. The higher concentration allows for small easy-to-measure dosages allowing for fast-acting performance.
Our Super Algaecide contains 23.5% copper triethanolamine and 7.1% chelated copper. Unlike other copper based algaecide, the chelated copper will protect your swimming pool from staining
Super Algaecide does not contain harmful chemicals, making your pool safe to swim in immediately following use. Ultimately, this maximizes the amount of time you're able to spend in the water.
This highly effective formula is non-foaming, has low odor, and is great for those with a sensitivity to strong smells.

SaleRank No. #14

1“ Chlorinating Tablets -2Lbs Sustainable Pool Water Maintenance Chlorine Tables

1-Inch Pool Cleaning Supplies: They are a convenient and effective way to maintain the cleanliness and hygiene of your swimming pool or spa.
Slow Dissolving Formula: They are designed to dissolve slowly, providing a steady release of chlorine into the water over time.
Stabilized and Long-lasting:That means they are resistant to sunlight degradation. This feature makes them ideal for outdoor pools exposed to direct sunlight.
Easy to Use: They are designed for use in floating dispensers or automatic chlorinators. Simply add them to the dispenser or chlorinator and let them do their job.
Versatile Application: They are suitable for various water environments, including swimming pools, hot tubs, and spas. Whether you have a small backyard pool or a larger commercial facility, these can provide a safe and enjoyable swimming experience for everyone

Rank No. #15

In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 10 Pounds

Eliminate bacteria, algae, and other organic contaminants, keeping your pool clean and clear all season long.
99% Trichloro-S-Triazinetrione and 90% available stabilized chlorine.
Dissolve slower helping you to avoid inconsistent chlorination.
Sun-stabilized protecting it from the sun's harmful rays.
Ideal size for floaters or automatic feeders.

Rank No. #16

Midnight Cove Chlorine Free SPA Shock- Instantly ELIMINATES CONTAMINANTS in SPAS & HOT TUBS- BOOSTS Chlorine OR Bromine Performance-Shock and SOAK in 15 Minutes- ELIMINATES Chemical Odors- 2 LB JAR

CHLORINE FREE FORMULA- Allows You To Soak 15 Minutes After Dosing. Chlorine And Bromine Performance Is Boosted and Chemical Odors Are Reduced.
REDUCES IRRITATION To the Skin, Nose and Eyes. Chloramines, Ammonia And Other Contaminants In the Water Are Oxidized Efficiently And Effectively.
PRECISION BLENDING Of All US Components In Our Own US Facility Is Your Assurance Of Highest Quality and Consistency In Every Jar.
DOSAGE: One ounce per 100 Gallons of Water Before Each Use or Weekly If Spa Is Not Used.

SaleRank No. #17

HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo Formula, 13.3oz

BENEFIT: Shock treat, sanitize, clarify, and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product
FEATURES: Multi-use pool shock with Cal Hypo; Use weekly to solve 90% of pool water problems within 24 hours; Fast-acting and fast-dissolving
VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

SaleRank No. #18

C3 3" Stabilized Chlorine Tablets for Swimming Pool and Spa | Individually Wrapped | Slow Dissolving | 25 lbs

99% Trichloro-S-Triazinetrione with 90% Available Stabilized Chlorine Stabilized (slow dissolving) Tablets
Tablets are individually wrapped
Excellent for floating feeders, skimmers and automatic chlorinators
25 Pound Bucket

SaleRank No. #19

Cloud-Out Pool Shock Clarifier and Oxidizer EZC02

Cloud-Out Pool Shock is stronger than non-chlorine alternatives
Continues to oxidize for up to seven days with just one treatment
Eliminates cloudy water quickly, and it won't disturb water balance
Removes organic debris as well as odors and biguanide foaming
Cloud-Out is the only combination clarifier and oxidizer in the world

Rank No. #20

HTH Pool Care Chlorine Granules Ultra, Swimming Pool Chlorinating Sanitizer & Shock, Kills Bacteria & Algae, 18 lbs

BENEFIT: Get the ultimate in pool care convenience with this all-in-one Cal Hypo formula; Sanitizes, controls algae, clarifies, softens pool water, and even prevents stain and scale to keep your pool clean, clear, and ready for summer fun
VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes and shock treats without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
MULTIFUNCTIONAL, FAST ACTING: The all-in-1 pool treatment has built-in algae control, pool water clarifier, stain and scale preventer, water softener and filter aid—all with visible sparkling blue results in 24 hours
COMPATIBLE WITH ALL POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
YOU’RE ALL CLEAR WITH HTH: For best results, use HTH 6-Way Test Strips twice weekly to test and balance your swimming pool water and keep chlorine levels between 1 and 4 ppm

Last update on 2023-09-05 / 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.