Best Controls Algae Swimming Pool Algaecides of 2025

Applied Swimtrine Plus is a 32 fl oz algaecide that effectively kills green and mustard algae, making it an ideal preventative measure to keep your swimming pool algae-free. Its triple-chelated formula contains 9.3% copper, which not only prevents regrowth of algae but also works with bromine, chlorine, salt water, ozone, biguanide, and minerals. This versatile algaecide is convenient to use as it does not foam and requires a biweekly preventative dose. With Applied Swimtrine Plus, you can enjoy a clean and clear swimming pool without worrying about the growth of algae.

Applied Biochemists Algae Control is a 1-gallon container of Swimtrine Plus, a swimming pool algae and deposit control solution that kills green and mustard algae. By adding a preventative dose biweekly, you can keep your pool algae-free. The solution works with various pool systems including bromine, chlorine, salt water, ozone, biguanide, and minerals. Swimtrine Plus will not foam, prevents regrowth of algae, and features a triple-chelated formula containing 9.3% copper. With Swimtrine Plus, you can enjoy a clean and clear pool without the hassle of algae.

HTH Algae Guard is a powerful swimming pool care product designed to provide long-lasting protection against algae. Its non-foaming formula effectively kills and prevents blooms of all algae types, including heavy green, black, and mustard algae. With HTH Algae Guard, you can enjoy a clean and clear pool for up to 3 months. This fast-acting solution can be added directly to your pool water, allowing you to swim right away. Whether you have a vinyl-lined pool or a saltwater system, this non-staining formula is compatible with all pools. For best results, use HTH Algae Guard every 3 months in combination with HTH Shock products.

Clorox Pool&Spa Green Algae Eliminator2 32 oz is a non-foaming liquid formula designed to effectively kill and prevent algae growth in all types of pools. It is suitable for all pools and controls algae, making it a great choice for those looking for a reliable algaecide. Customers have praised its easy-to-use formula and its ability to keep their pools crystal clear.

Leslie's Algae Control is a highly concentrated algaecide that can help you control the growth of algae in your swimming pool. It is effective as both a preservative and a corrective treatment, making it a versatile solution for pool maintenance. This product is also convenient as it will not stain or foam, making it easy to use. With an active ingredient of 60%, Leslie's Algae Control is a powerful and reliable solution for keeping your pool clear and healthy.

In The Swim Algaecide is a copper-based formula that helps to keep algae growth at a minimum, making it great for spring openings and routine maintenance of your swimming pool. Its highly concentrated copper-based formula eradicates small, isolated blooms to control and prevent yellow or mustard algae growth. The higher concentration allows for small easy-to-measure dosages, which means fast-acting performance. Unlike other copper-based algaecides, the chelated copper in this formula will protect your swimming pool from staining. In The Swim Algaecide is non-foaming, has low odor, and is safe to swim in immediately following use, as it does not contain harmful chemicals.

HTH Algae Guard 10 is a concentrated formula that is fast-acting, non-foaming and prevents future growth of algae. It kills green algae and works with vinyl-lined pools and saltwater systems. This product is easy to use, simply apply it directly to the pool with the pump running and use regularly to ensure maximum effectiveness.

The In The Swim Algaecide is designed to keep your swimming pool free from algae during the winter months. It effectively controls algae growth for up to five months in covered pools, ensuring that your pool remains clean and ready for use. You can easily apply it to both inground and above-ground pools, giving you flexibility in maintenance. With a recommended dosage of just one quart per 20,000 gallons, it's simple for you to manage your pool's chemical needs without hassle.

Doheny's Algaecide is an excellent choice for keeping your swimming pool free from all types of algae. This metal-free formula ensures that there are no stains left behind after application, making it a hassle-free option for pool maintenance. With one bottle capable of treating up to 160,000 gallons, you can easily manage algae growth by using it just once a week. Plus, it doesn't create foam or cloudiness in your pool water, so you can enjoy clear, clean water without any extra effort.