Top Pool Chlorine Brands to Keep Your Waters Sparkling!

When it comes to maintaining a crystal-clear swimming pool, selecting the right chlorine brand is essential for both safety and cleanliness. Among the plethora of options available, certain brands consistently stand out for their effectiveness and reliability. These industry leaders offer a range of chlorine products that cater to various preferences, whether it's for residential use or large commercial pools. For those eager to discover the top brands that will keep their pools sparkling clean, read on below to explore our curated list.

Illustration of pool chlorine

Best brands of pool chlorine in 2025

Clorox

Clorox is a leading brand in the production of pool chlorine, known for its effective and user-friendly products. Clorox® Disinfecting Bleach, containing approximately 7.1% available chlorine, is a popular choice for maintaining pool water quality. The company has invested in innovative water testing technologies to enhance user experience and promote efficient pool maintenance practices. Clorox Pool & Spa products, including chlorine stabilizers, are highly regarded for their ease of use and effectiveness in keeping chlorine levels stable, even in harsh sunlight conditions. As part of the broader swimming pool chemicals market, which is expected to grow at a CAGR of 8.5% from 2023 to 2032, Clorox continues to be a significant player.

HTH

HTH is a leading brand in the pool care industry, renowned for its high-quality chlorine products that ensure clean and safe swimming pool water. HTH chlorine granules, based on calcium hypochlorite, are widely used in both private and public pools and are approved for use in drinking water, highlighting their superior quality. The brand's chlorine tablets are designed to dissolve slowly, providing a steady source of chlorine for up to one week, and are compatible with all pool types, including saltwater systems. In the global swimming pool chemicals market, HTH products are part of a segment dominated by sodium hypochlorite and liquid chlorine, with North America holding the largest market share in 2023. HTH's focus on quality, innovation, and user experience sets it apart from competitors.

In The Swim

In The Swim is a renowned brand in the pool maintenance industry, particularly noted for its expertise in pool chlorine chemistry. They provide comprehensive guides on maintaining optimal chlorine levels, recommending 2-4 ppm of free chlorine for most backyard pools, although this can be adjusted based on the use of mineral purifiers or ozonators. Their resources highlight the importance of hypochlorous acid, the active form of chlorine, which is crucial for sanitizing pool water. The brand also emphasizes the role of cyanuric acid in protecting chlorine from sunlight degradation and suggests using trichlor tablets to maintain daily chlorine levels. For effective shocking, they recommend achieving a breakpoint chlorination level of around 30 ppm.

Pool Essentials

Pool Essentials is a highly regarded brand in the pool chemical market, known for its effective and user-friendly products. Their liquid chlorine is calcium-free, ensuring it won't cloud pool water, and is suitable for all types of pools, including saltwater pools. The Pool Essentials 8.25-lb Liquid Chlorine is designed for everyday chlorination and weekly shock treatments, making it a versatile choice for pool maintenance. With a strong customer satisfaction rating of 4.6 out of 5, Pool Essentials products are trusted by many pool owners. The global swimming pool chemicals market, which includes brands like Pool Essentials, is projected to grow at a CAGR of 8.5% from 2023 to 2032. For more information on Pool Essentials products, visit their product page.

Leslie's

Leslie's Inc. is a leading retailer in the pool and spa care industry, renowned for its high-quality pool chlorine products. The company, with over 990 physical locations and a robust e-commerce presence, dominates 15% of the $13.8 billion aftermarket pool/spa product spend market. Notably, Leslie's experienced a significant 16.3% sales growth in FY 2022, largely driven by chlorine price inflation, with Trichlor sales contributing $184 million to this growth. However, this growth is considered unsustainable due to the temporary nature of the chlorine price increases. Despite this, Leslie's remains a major player in the market, serving both residential and commercial clients with a wide range of pool supplies.

Rx Clear

Rx Clear is a renowned brand in the swimming pool chemicals market, particularly noted for its high-quality pool chlorine products. The brand offers a range of chlorine solutions, including granular and stabilized chlorine tablets, which are essential for maintaining water quality and preventing algae and bacteria growth. The global swimming pool chemicals market, which includes products from Rx Clear, is projected to grow at a CAGR of 8.5% from 2023 to 2032, reaching a market size of USD 1723.5 million by 2032. Chlorine, a key product from Rx Clear, remains a dominant segment in the market, with liquid chlorine accounting for over 40% of the market share in 2021. The brand's commitment to innovative solutions and user-friendly products has contributed to its strong market presence.

Doheny's

Doheny's is a leading brand in the pool chlorine market, renowned for its high-quality products that ensure clean, clear, and safe pool water. Their Di-Chlor granular chlorine boasts 56% available chlorine, making it highly effective in destroying bacteria quickly without raising the pH level. For daily chlorination, Doheny's 3-inch chlorine tablets are superior, containing 99% pure Trichloro-S-Triazinetrione and 90% available stabilized chlorine, and are designed to dissolve slowly and last longer. These tablets also include a UV inhibitor to maintain consistent chlorine levels even under intense sunlight. With a state-of-the-art manufacturing process, Doheny's products offer consistent and reliable protection against bacteria and algae growth.

Swim Best

Swim Best is a renowned brand in the swimming pool chemicals market, particularly noted for its high-quality pool chlorine products. The global swimming pool chemicals market, which includes brands like Swim Best, is expected to grow at a CAGR of 8.5% from 2023 to 2032, reaching a market size of USD 1723.5 million by 2032. Chlorine, a key product offered by Swim Best, is the most commonly used chemical for pool sterilization, with the liquid chlorine segment accounting for over 40% of the overall market share in 2021. The emphasis on technology-driven solutions and effective pool maintenance practices further enhances the adoption of Swim Best's products. With the increasing number of swimming pools, especially in residential settings, the demand for reliable pool chemicals like those from Swim Best continues to rise.

Kem-Tek

Kem-Tek is a renowned brand in the swimming pool chemicals market, particularly noted for its All-in-One Chlorinating Granules, which are pH neutral and suitable for vinyl-lined pools. These granules dissolve quickly and completely, reducing direct contact with the pool liner and eliminating residues. To maintain optimal pool conditions, Kem-Tek recommends keeping the chlorine level between 1-3 ppm and the pH between 7.2 and 7.6. The product is effective in controlling bacteria and algae, and it is used in both pool and spa applications. The swimming pool chemicals market, which includes products like Kem-Tek's, is expected to grow significantly, with the global market valued at USD 3,905 Million in 2021 and projected to reach USD 5,254 Million by 2030, growing at a CAGR of 3.5%. For more detailed information, you can find the EPA registration document here.

Aqua Chem

Aqua Chem is a renowned brand in the pool chemicals market, particularly noted for its high-quality Liquid Chlorine, which is available as sodium hypochlorite with 130 g/liter of available chlorine. This product is highly effective for controlling algae and bacteria in both indoor and outdoor swimming pools, suitable for daily chlorination and shock treatments. The liquid chlorine has a very alkaline pH of 12-13 and is applied at rates of 200 ml per 10,000 liters of pool water for stabilized pools and 400 ml per 10,000 liters for unstabilized pools. Aqua Chem's product ensures immediate availability of hypochlorous acid (HOCl), the most effective sanitizing form of chlorine, making it a preferred choice among pool owners. With its precise application guidelines, Aqua Chem helps maintain optimal pool water conditions.