Best In The Swim in 2026

Keeping your swimming pool water clean and sanitary is one of the most important steps for pool maintenance. Let In The Swim’s 3 inch chlorine tablets for pools help. With a powerful active ingredient and slow dissolving formula, our chlorine tablets will keep your swimming pool water sanitary longer, saving you time and money.

Chlorine tablets contain 99% Trichloro-S-Triazinetrione (Trichlor) and 90% available chlorine, making it one of the strongest products on the market. Each 3 inch chlorine tablet is sun-stabilized which increases longevity in outdoor swimming pools.

Pool chlorine tablets help you avoid inconsistent chlorination, which is a common occurrence when using granular or liquid chlorine to sanitize a pool. Keeping your pH and alkalinity levels balanced helps with the effectiveness of pool chlorine in the water.

Super Start-Up Kit up to 30,000 Gallons Includes: 2 qts. Stain Away for Swimming Pools

1 qt. Clarifier for Swimming Pools

4 x 1 lb. Pool Shock Bags

Keeping your swimming pool water clean and sanitary is one of the most important steps for pool maintenance. Let In The Swim’s 3 inch chlorine tablets for pools help. With a powerful active ingredient and slow dissolving formula, our chlorine tablets will keep your swimming pool water sanitary longer, saving you time and money.

Chlorine tablets contain 99% Trichloro-S-Triazinetrione (Trichlor) and 90% available chlorine, making it one of the strongest products on the market. Each 3 inch chlorine tablet is sun-stabilized which increases longevity in outdoor swimming pools.

Pool chlorine tablets help you avoid inconsistent chlorination, which is a common occurrence when using granular or liquid chlorine to sanitize a pool. Keeping your pH and alkalinity levels balanced helps with the effectiveness of pool chlorine in the water.

Save time and take the guesswork out of measuring chemicals when opening your pool with our pre-measured pool opening kits.

The chlorine pool shock contains 68% calcium hypochlorite, which will get your pool water clean, clear, and safe to swim in.

Our clarifier keeps your water crystal clear by coagulating dirt, a process that helps your filter be more efficient.

Save time and take the guesswork out of measuring chemicals when opening your pool with our pre-measured pool opening kits.

The chlorine pool shock contains 68% calcium hypochlorite, which will get your pool water clean, clear, and safe to swim in.

Our clarifier keeps your water crystal clear by coagulating dirt, a process that helps your filter be more efficient.

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!

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

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.

Fast-acting Calcium Hypochlorite chlorine granules provide 65% minimum available chlorine for hard-hitting immediate results!

NOTE: This item cannot be shipped to Alaska or Hawaii (item will be removed from your order).

Fast-acting Calcium Hypochlorite Cal-Chlor chlorine granules provide 68% available chlorine for hard-hitting immediate results!

NOTE: WE ARE CURRENTLY UNABLE TO SHIP SUPER ALGAECIDE TO THE STATE OF CALIFORNIA.. We apologize for the inconvenience.

Provides superior algae-fighting power with long lasting effects

Safe enough to swim directly after use

! quart bottle

Non-metallic, non-foaming, low-odor polymer-based algaecide

Kills all types of algae, including pink algae

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.

61% available bromine and 27% available chlorine

For small spas bromine can be used in a bromine floater.

Perfect for bromine floaters and automatic bromine feeders

Use when total alk. drops below 80 ppm.

Keeps your pH and Chlorine from becoming unstable Granular form, easier to apply into your water

Compatible with pool, spa, and hot tub

Round, 24-foot net cover makes leaf and debris removal quick and easy; Pool size compatibility: 21 feet

Made of exceptionally durable, woven space-age material that lasts for years and years

Conveniently stretches over your winter pool cover to help prolong the life of your cover; Also works with solar covers

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

Powerful 90% available stabilized chlorine

98.6% Trichloro-S-Triazinetrione (TriChlor)

1-inch tablets are suitable for smaller pools and spas

Weekly maintenance product

Enhances filter capability

Cleans swimming pools, hot tubs or spas.

In The Swim Super Floc Out is perfect for quickly clearing up particles in cloudy swimming pool water. Unlike clarifier, which can take days, flocculant works in a matter of hours.

Our pool flocculant clumps together tiny particles in your pool, a process know as coagulation. Once coagulated, the larger clumps sink to the bottom of the pool to be easily vacuumed out.

Pool flocculant will not work with a cartridge filter system unless you have custom plumbing setup that allows you to bypass the filter when you vacuum.

In The Swim Super Clarifier clears pool water quickly and effectively, improving filter function and efficiency.

Our liquid pool clarifier removes small particles from the water by joining them together, allowing the filter to remove them.

It is highly concentrated, allowing you to use half the dosage of other pool clarifiers.

100% Sodium Bicarbonate

Proper range is 80-120 ppm

Pool Dosage: 1� pounds per 10,000 gallons

Reduces Free Available Chlorine

90% Granular Sodium Thiosulfate

No premixing required

Economy winter above ground pool covers feature heavy-duty polyethylene construction.

Features an 8 x 6 filament scrim for a tightly woven winter pool cover.

Double stitched borders around the entire edge of the pool cover enhances durability; prevents ripping from high winds.

Air Pillow designed to be placed under your winter cover to relieve stress on pool walls caused by ice

Creates an easier removal of built up water and debris

Heavy Duty 16 gauge vinyl construction for all weather conditions

Can be applied to inground or above ground pools/spas

Recommended for use in well water to prevent staining

Fast acting liquid algaecide prevents green and yellow mustard algae

Super powerful and effective chlorine shock treatment

Ideal for spring openings, stubborn algae blooms, and regular maintenance

Active Ingredient: Calcium Hypochlorite 73%

Prevents decaying leaves from collecting on your pool cover or in pool water

Lay Leaf Catcher on top of winter cover before leaves begin to fall and lift off when trees are bare

Made from durable knitted polyethylene

Suggest for use with well water

Chelates copper and iron

Safe in all pool interior types

Establishes residual bromine

Use every time you drain and refilled with fresh water

Active Ingredient: Sodium Bromide 98 - 100%