Best 3 Inch Pool Chlorine of 2025

Bryan Hicks Avatar
Bryan Hicks
Last Updated: Jan 3, 2025

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3 Inch Pool Chlorine is an essential product for maintaining a clean and healthy swimming pool. These tablets dissolve slowly, providing a steady flow of chlorine to kill bacteria, algae, and other contaminants. With a high concentration of chlorine, they are effective at keeping the water clear and free of unpleasant odors. These tablets are also easy to use, simply place them in a chlorine floater or feeder and let them do their job. Regular use of 3 Inch Pool Chlorine will ensure a safe and enjoyable swimming experience for all.

At a Glance: Our Top Picks

In The Swim 3 Inch Chlorine Tablets Cover #TOP 1
In The Swim 3 Inch Chlorine Tablets
ftb score rating icon 9.9
HTH 42052W Chlorine Tabs Cover #TOP 2
HTH 42052W Chlorine Tabs
ftb score rating icon 9.8
Doheny's 3 Inch Swimming Pool Chlorine Tablets Cover #TOP 3
Doheny's 3 Inch Swimming Pool Chlorine Tablets
ftb score rating icon 9.6

Top 10 3 Inch Pool Chlorine

In The Swim 3 Inch Chlorine Tablets

C3050
Multicolor
50 Pound
In The Swim 3 Inch Chlorine Tablets Cover
In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds

In The Swim's 3 inch chlorine tablets are a powerful and effective way to keep your swimming pool water sanitary. Made with 99% Trichloro-S-Triazinetrione (Trichlor) and 90% available chlorine, these tablets are sun-stabilized for outdoor pools and are individually wrapped for easy use. Customers have praised the tablets for their effectiveness and quick delivery, and have found them to be a great value for the price.

What We Like
Individually wrapped
Slow dissolving
90% available chlorine
Effective against bacteria and algae
Suitable for residential and commercial pools

HTH 42052W Chlorine Tabs

HTH
42052W
Clear
5 lbs
HTH 42052W Chlorine Tabs Cover
HTH 42052W Pool Care 3" Chlorine Tabs Advanced, Individually Wrapped Tablets - Swimming Pool Sanitizer with Clarifier & Algaecide, Destroys Bacteria & Algae, Delivers Clear Water All Season, 5 lbs

HTH Chlorine Tabs are advanced, individually wrapped tablets designed to protect your swimming pool and swimmers with one easy, convenient tablet. This product is a sanitizer, clarifier, and algaecide that sanitizes, clarifies, and kills algae for crystal clear water all season long. The slow-dissolving, long-lasting formula is sun-protected for longer chlorine life and lasts up to one week. HTH Chlorine Tabs are compatible with all pool types, including vinyl-lined pools and saltwater systems, and can be used in a floater, feeder, or skimmer basket. 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.

What We Like
Trusted and reliable
Long-lasting results
Convenient automatic delivery
Secure top for child safety
Cost-effective in the long run
#TOP 3

Doheny's 3 Inch Swimming Pool Chlorine Tablets

4824
White
50 lb.
Doheny's 3 Inch Swimming Pool Chlorine Tablets Cover
Doheny's 3 Inch Stabilized Chlorine Tablets | Pro-Grade Pool Sanitizer, Long Lasting, Slow Dissolving, 99% Pure Tri-Chlor, Individually Wrapped - 50lb

Keep your pool clean and safe with Doheny's 3 Inch Swimming Pool Chlorine Tablets. These pro-grade pool sanitizers are made from 99% Trichloro-S-Triazinetrione and 90% stabilized chlorine, ensuring long-lasting and slow-dissolving chlorine distribution. Each tablet is pre-stabilized to prevent premature chlorine burn-off, making them last longer. The childproof locking lid provides safety for your family, and the individually wrapped tablets minimize odor, dust and skin contact. Simply place the tablets in your pool skimmer, floater, or feeder for easy chlorine distribution. Doheny's has been perfecting their chlorine formula for over 50 years, ensuring quality pool supplies.

What We Like
Pro-grade pool sanitizers made from 99% Trichloro-S-Triazinetrione and 90% stabilized chlorine
Long-lasting and slow-dissolving chlorine distribution with pre-stabilized tablets
Childproof locking lid and individually wrapped tablets for safety and minimized odor, dust and skin contact
Easy chlorine distribution by placing tablets in pool skimmer, floater, or feeder
Quality pool supplies from a brand with over 50 years of chlorine perfectionism
#TOP 4

C3 Stabilized Chlorine Tablets

C3...
204525
White
25 Pounds
C3 Stabilized Chlorine Tablets Cover
C3 3" Stabilized Chlorine Tablets for Swimming Pools | Easy to Use | for Above Ground or Inground Pool | Individually Wrapped | Slow Dissolving | 25 lbs

The C3 Stabilized Chlorine Tablets are an excellent choice for maintaining the cleanliness and hygiene of your swimming pool or spa. These slow-dissolving tablets are individually wrapped, making them convenient and easy to use. They contain 99% Trichloro-S-Triazinetrione with 90% available stabilized chlorine, ensuring effective disinfection and sanitation. The tablets are suitable for floating feeders, skimmers, and automatic chlorinators, providing a hassle-free way to keep your pool or spa water crystal clear. With a 25-pound bucket, you'll have an ample supply to last you for a long time. Trust the C3 Chlorine Tablets to keep your pool or spa water clean and safe for swimming.

What We Like
Slow-dissolving
Individually wrapped
Effective disinfection
#TOP 5

XtremepowerUS 3-Inch Chlorine Tablets

71104
White
10 Pound
XtremepowerUS 3-Inch Chlorine Tablets Cover
Xtremeclear 3-Inch Chlorine Tablets 99% Pure Tri-Chlor for Swimming Pools Spa Hot Tub 10lbs Bucket - Individually Wrapped Stabilized Sanitizer Slow Dissolving

XtremepowerUS Chlorine Tablets are a versatile solution for maintaining clean water in swimming pools, hot tubs, and spas. You can easily use them with floaters, skimmers, or automatic feeders, making pool care hassle-free. With just one tablet, you can save approximately 5,000 gallons of water, reducing the frequency of changes. These tablets contain 99% pure Trichloro-S-Triazinetrione and 90% stabilized chlorine, ensuring effective sanitization. Additionally, they are pre-stabilized against UV rays, meaning they last longer and maintain their effectiveness, giving you peace of mind while enjoying your pool or spa.

What We Like
Versatile for various water settings
Easy to use with pool equipment
Water-saving efficiency
High-quality active ingredients
Long-lasting protection against UV
#TOP 6

Rx Clear 5 lbs. Chlorine Tabs

A204505
5 Pounds
Rx Clear 5 lbs. Chlorine Tabs Cover
C3… 5 lbs. 3" Stabilized Chlorine Tabs for Swimming Pools | Easy to Use for Above Ground or Inground Pool | Slow Dissolving Individually Wrapped Chlorinating Tablets | 5 Pound Bucket

Rx Clear Chlorine Tabs come in a convenient 5-pound bucket, featuring slow-dissolving tablets that help maintain steady chlorine levels in your pool. This ensures your water stays sparkling clean and inviting for swimming. With 99% Trichloro-S-Triazinetrione and 90% available chlorine, these tablets are perfect for use in skimmers, floating feeders, and automatic chlorinators. You’ll appreciate the ease of use, as the individually wrapped tablets make handling simple and mess-free. Just drop them in your pool setup, and enjoy the peace of mind that comes with consistently treated water.

What We Like
Slow-dissolving formula
Maintains consistent chlorine levels
Individually wrapped tablets
Compatible with various feeders
#TOP 7

Rx Clear 3-Inch Chlorine Tablets for Pools and Spas

204007
White
50 lbs
Rx Clear 3-Inch Chlorine Tablets for Pools and Spas Cover
Rx Clear 3" Inch Stabilized Chlorine Tablets | 50 Pounds | Individual Chlorinating Tabs for Sanitizing Swimming Pools & Spas | Long Lasting, Slow Dissolving, and UV Protected

The Rx Clear 3-Inch Individually Wrapped Chlorine Tablets are an affordable and efficient solution for keeping your swimming pool and spa clean and safe. These tablets are adaptable to your pool or hot tub, and easy to use. Each individually wrapped chlorinating tablet weighs 7 ounces, providing a long lasting effect. These slow dissolving, 90% available chlorine, 99% Trichlor tablets are UV protected and perfect for use as a bactericide, algaecide, and disinfectant. Rx Clear brand provides more available chlorine in each tab at a much lower cost compared to other brands. Trust Rx Clear to balance your pool and spa chemistry and keep your water safe and clear.

What We Like
Easy to use and adaptable to your pool or hot tub
Long lasting effect due to slow dissolving, 90% available chlorine, 99% Trichlor formula
Low price, high quality compared to other brands
Controls algae and kills bacteria, ensuring a safe and clean swimming environment
UV protected for added durability
#TOP 8

C3 Chlorine Tablets 10lb

C3…
C3-TABS-10W
C3 Chlorine Tablets 10lb Cover
C3-10lb Chlorine Tablets, 3 Inch | Swimming Pool & Spa Chlorine Tablets | Long-Lasting, Slow Dissolving, Individually Wrapped Chlorine Tabs | Tri-Chlor 3 Inch Tablets Pool Cleaner

The C3 Chlorine Tablets are designed to keep your pool, spa, or hot tub clean and safe. With a slow-dissolving formula, these tablets ensure that chlorine levels remain stable for longer periods, giving you peace of mind. They contain a stabilizer that protects chlorine from being depleted by sunlight, allowing your pool to stay cleaner for up to a week. Additionally, these tablets help improve water quality by eliminating contaminants, resulting in clear and sparkling water. Their individually wrapped design makes them easy to use; simply unwrap and add to your chlorinator for hassle-free sanitization.

What We Like
Long-lasting chlorine protection
Stabilized against UV light
Improves water quality
Convenient individual wrapping
#TOP 9

C3 3-Inch Chlorine Tablets

C3…
C3-TABS-5W
C3 3-Inch Chlorine Tablets Cover
C3-5lb Chlorine Tablets, 3 Inch | Swimming Pool & Spa Chlorine Tablets | Long-Lasting, Slow Dissolving, Individually Wrapped Chlorine Tabs | Tri-Chlor 3 Inch Tablets Pool Cleaner

The C3 Chlorine Tablets are designed to keep your swimming pool or spa clean and safe. With a slow-dissolving formula, each tablet ensures long-lasting chlorine levels, helping to maintain water clarity and quality. The inclusion of cyanuric acid protects the chlorine from being depleted by sunlight, allowing your pool to remain cleaner for longer periods. These tablets are easy to use, as they come individually wrapped, making it simple for you to add them to your pool’s chlorinator. One tablet can effectively sanitize up to 10,000 gallons of water, providing you with a hassle-free solution for pool maintenance.

What We Like
Long-lasting chlorine effectiveness
UV protection for chlorine
Individually wrapped for convenience
Easy to use with floaters
#TOP 10

HTH Super 3" Chlorinating Tablets

HTH
42042
5 lbs
HTH Super 3" Chlorinating Tablets Cover
HTH 42042 Super 3" Chlorinating Tablets Swimming Pool Chlorine, 5 lbs

HTH Chlorinating Tablets are a must-have for pool owners who want to keep their water clean and clear all season long. These tablets are easy to use and can be placed in a pool skimmer, floater, or feeder for simple, DIY pool care. Each tablet treats 10,000 gallons of water and lasts up to a week, making it convenient for pool owners. The tablets are compatible with vinyl-lined pools and saltwater systems, ensuring that they can be used in a variety of pool setups. With their ability to kill bacteria and algae, chlorinate the water, and clarify it, these tablets provide multiple benefits for pool owners. Additionally, the tablets are sun protected, which extends their chlorine life. With HTH Chlorinating Tablets, you can enjoy swimming in clean and clear water without any worries.

What We Like
Sanitizes and protects water
Easy and convenient to use
Compatible with various pool setups
Buying Guide Image

Frequently Asked Questions (FAQs)

1. How many 3 inch chlorine tablets for a 1000 gallon pool?

For a 1000 gallon pool, you would typically need 1 or 2 3-inch chlorine tablets. The number of tablets needed depends on the volume of the pool. As a general rule, one 3-inch tablet is recommended for every 5000 gallons of water.

2. How long do 3 inch chlorine tablets last?

The duration for a 3-inch chlorine tablet to dissolve varies for each pool. On average, stabilized chlorine tablets, also known as trichlor tablets, can last anywhere from two to three days. However, this can change depending on factors such as water temperature, sunlight exposure, and pool usage.

3. Why are 3-inch chlorine tablets so expensive?

The prices of 3-inch chlorine tablets have increased due to various factors. The supply and demand for these tablets do not match, leading to higher prices. Additionally, there has been a surge in pool construction during the pandemic, creating more demand. This increased demand has caused pool owners and maintenance businesses to consider switching from tablets to powdered chlorine.

Editor's Notes

During our 3 inch pool chlorine research, we found 24 3 inch pool chlorine products and shortlisted 10 quality products. We collected and analyzed 188,461 customer reviews through our big data system to write the 3 inch pool chlorine list. We found that most customers choose 3 inch pool chlorine with an average price of $104.09.

The 3 inch pool chlorine are available for purchase. We have researched hundreds of brands and picked the top brands of 3 inch pool chlorine, including In The Swim, HTH, Doheny's, C3..., XtremepowerUS. The seller of top 1 product has received honest feedback from 5,654 consumers with an average rating of 4.6.

Written by
Bryan Hicks Avatar

Bryan Hicks is a professional gardener and a writer who lives in North Texas with his family and his dog. Bryan has spent more than half of his life surrounded by garden products. He has extensive experience in garden makeovers and maintenance and lawn care. His areas of expertise include outdoor decoration, gardening and garden design.