Best Pool Rx Pool Algaecides in 2026

BENEFITS: Kills green and mustard algae

USE: Add a preventative dose biweekly and be algae free

COMPATIBILITY: Works with bromine, chlorine, salt water, ozone, bigaunide and minerals

Reliable & Effective

90-days no algae guarantee (when used according to instructions in balanced pool water)

Kills and prevents blue-green, green, yellow and black algae

Non-Metallic Algaecide

For All Pool Types (Vinyl, Fiberglass, Concrete, Gunite, etc.)

Effective against all algae types (Green, Black, Yellow, Mustard, Pink)

KEEP ALGAE AT BAY - This product is effective in controlling a broad range of algae. Especially effective against Chara(Stone wart), Spirogyra, Cladophora, Vaucheria Ulothrix, Microcystis, Oscillatoria, Mustard Algae and Black Algae. The triethanolamine in this product prevents the precipitation of the copper with the carbonates or bicarbonates in the water. Rx Clear Copper Algaecide is used to prevent and kill unwanted infestations in your swimming pool.

COAT THE WALL - Algaecide coats the walls of the swimming pool, keeping algae in suspension. Surfactant splits open algae cells, helping to destroy them. The Rx Clear Copper Algaecide coats the pool wall, keeping your swimming pool crystal clear.

BIWEEKLY MAINTENANCE - Each bottle of Algaecide is 32 ounces of fluid. Swimming pools require only 4 oz. of Rx Clear Swimming Pool Algaecide every two weeks per every 10,000 gallons of water.

Treats and prevents green, black and yellow algae

Clarifies water

Non-foaming

BENEFITS: Kills green algae and prevents future algae blooms in your swimming pool so you can get back to enjoying your summertime fun

USE: Apply add the product directly to the pool with the pump running; Use regularly for maximum effectiveness

COMPATIBILITY: Great for vinyl-lined pools and saltwater systems

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

BENEFITS: Kills green and mustard algae

USE: Apply 8 fl oz per 10,000 gallons of pool water every 2 weeks

COMPATIBILITY: Works with chlorine and bromine sanitizers

CONTAINS: BioGuard Algae Complete (72 oz), LeisureQuip ScumBoat Floating Scum Absorber, and LeisureQuip Pool Care Log Book

Algae prevention weekly treatment for swimming pools - Once a week dual action algaecide

Prevents and Kills Green, Mustard and Black Algae

Quart black liquid algaecide poly 60 for swimming pools

Non-metallic & non-foaming algaecide

If pool is green use 11-17 oz per 10,000 gallons (29,090 - 18,823 gallons per bottle) & should be used with chlorine shock combined

BENEFIT: Get long-lasting protection from extreme algae; This non-foaming algae control kills and prevents blooms of all algae types

OUR STRONGEST ALGAE CONTROL: Kills, prevents and protects against regrowth of heavy green, black and mustard swimming pool algae for up to 3 months

NON-FOAMING, FAST-ACTING: Add HTH Algae Guard Ultra directly to your swimming pool water and swim right away

Multi-functional pool shock with algae-fighting crystals

Creates crystal clear water

Kills and prevents green, black and mustard pool algae