Best Controls Algae Swimming Pool Chlorine 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.

Helps chlorine last longer

Reduces sun's impact on chlorine

Perfect for salt pools, new pools and pools that use liquid chlorine

24 bags (1-pound each)

Fast-Acting Quick-Dissolving Swimming Pool Sanitizer

Kills bacteria, controls algae, and destroys organic contaminants in pools

Dissolves Quickly and Completely

Stabilized Spa Chlorine

56% Available Chlorine

Long-Lasting Chlorine Tabs: Each tab is pre-stabilized against the sun's UV rays to prevent premature chlorine burn-off, making them last longer

Active Ingredients: Our pool tablets are pro-grade made from 99% Trichloro-S-Triazinetrione and 90% stabilized chlorine

Safe for the Family: Each 50lb bucket has a childproof locking lid for safety. Each 3 inch chlorine tablet for your pool comes individually wrapped to minimize odor, dust and skin contact

Everything you need in 1 individually wrapped tablet

Prevents algae and kills bacteria

Use in skimmer, feeder or floater

Product Does Not Cloud Pool

Ready To Use, No Mixing Required - Great Choice for Pool Closings

Perfect For Pressure Washing, Sanitation & Other Related Uses

Controls algae

Kills bacteria

Prevents corrosion and scale

Controls all types of pool algae, bacteria, and other disease-causing organisms

Long-lasting, slow dissolve tab for even and consistent sanitization

Built-in protection against sunlight to shield against chlorine burn off

Controls Algae

Prevents corrosion and scale

Removes organic contaminants for clear water

99% Trichloro pool chlorine tablet that maintains a healthy pool

Kills harmful bacteria

Long-lasting sunlight protection

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

BENEFIT: Give your swimming pool water a visibly brilliant sparkle with this convenient and easy-to-use Cal Hypo formula; Destroys bacteria and controls algae

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

SLOW DISSOLVING, LONG LASTING: The patented HTH slow dissolving technology protects against chlorine loss in direct sunlight and a sparkle that lasts up to 1 week

Long-Lasting Chlorine Tabs: Each tab is pre-stabilized against the sun's UV rays to prevent premature chlorine burn-off, making them last longer

Active Ingredients: Our pool tablets are pro-grade made from 99% Trichloro-S-Triazinetrione and 90% stabilized chlorine

Safe for the Family: Each bucket has a childproof locking lid for safety. Each 3 inch chlorine tablet for your pool comes individually wrapped to minimize odor, dust and skin contact