Top 10 Best yellow out in 2026

Last Updated - 6/12/2026

🏆Best Choice

Coral Seas

Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs.

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Compatible with pools operating a chlorine generator
•Simple to use, requires no brushing, and cleans up algae gently without the use of harsh chemicals
•Used in conjunction with pool shock to safely remove green, yellow, brown, and pink algae from your pool
•Safe, non-toxic and can be used on all pool surfaces, including vinyl liners

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$17.60

$21.99

-20%

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United Chemical

United Chemicals Yellow Treat® 2 Pound Container

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•The best and most trusted yellow algae removal product.
•Yellow Treat is a non-toxic algicide and can be used in pools and spas
•5 ozs treats 10,000 gallons

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$19.13

$39.99

-52%

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IRON OUT

Iron OUT Rust Stain Remover Spray Gel, Remove Rust Stains in Bathrooms, Kitchens, Laundry, and Outdoors, Made in the USA, 24 Ounces

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Goodbye Rust: Remove rust stains around the home with a heavy-duty rust removal product trusted for over 60 years. The unique cleaner gel clings to dissolve rust stains on contact for difficult-to-reach places.
•Super Strength: The heavy-duty stain remover is specifically formulated to easily rinse away the toughest rust stains, eliminating the need for scrubbing. This product is septic-friendly when used as directed.
•Multi-Purpose: Rust-colored stains happen for many reasons, especially with high iron, hard water. Use the rust remover for vertical and hard-to-reach surfaces like showers, tubs, sinks, colorfast carpets, tile, and more.
•Easy To Use: Typical cleaning sprays and gels, bleaches, and soaps aren’t cut out for rust removal. Utilize our special solution as needed to keep your items and surfaces looking clean and new. Please refer to package instructions for best results.
•Performance Guarantee: Our cleaning products come with a satisfaction guarantee. We will meet or exceed your expectations with our specially-formulated cleaners, proudly made in the USA.

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$4.97

$5.39

-8%

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Coral Seas

Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 4 lbs.

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•MULTI-PURPOSE: Raise the levels for chlorine, water hardness, and pH in your swimming pool giving you crystal clear water.
•INCREDIBLY STRONG: Due to its high percentage of chlorine, Super Shock is very effective and efficient for a quick chlorine boost.
•MIX BEFORE YOU FIX: Add this powder to a bucket of water before you add it to your pool. Add a 1 lb bag per 10,000 gallons of pool water.
•BEAT THE GREEN: Kill the algae in your swimming pool by adding 3 bags of shock per 10,000 gallons of pool water.
•WORKS BEST AT NIGHT: Maximize performance by adding this shock to your pool at night. Wait to swim 8 to 10 hours after application.

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$29.26

$50.99

-43%

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United Chemical

United Chemicals Yellow Treat 2 lb - YT-C12 - 2 PACK

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Rescue Treatment for use to control blooms of yellow and mustard algae in any type of pool or spa
•Yellow Treat is the original mustard algae killer that pioneered the use of sodium bromide as an algaecide.
•Just 5 ounces treats 10,000 gallons
•The gold standard for removing yellow and mustard algae from your pool.
•Yellow Treat is a non-toxic algicide

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$37.50

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OUT

Rust RMVR PWDR 1LB12OZ

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Superior Solution to Any Rust Stain
•Cleans Toilets, White Laundry, Water Softeners and More
•Rinses Rust Away Without Scrubbing

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$10.03

$12.49

-20%

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United Chemical

United Chemicals YTP71 5oz Bag Yellow Treat

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•POWERFUL MUSTARD & YELLOW ALGAE KILLER - Targets stubborn yellow and mustard algae blooms fast. Yellow Treat dissolves directly in pool water and works quickly to restore clarity without harsh side effects. Just 5 ounces treats 10,000 gallons.
•EASY-TO-USE YELLOW ALGAECIDE FOR ALL POOL TYPES - Just pour, brush and shock. Works with saltwater, chlorine, and freshwater systems. No complicated prep—perfect for quick treatments or regular pool maintenance.
•TREATS ABOVE GROUND & INGROUND POOLS - Whether you're maintaining a small backyard setup or a large inground pool, this formula handles both with ease. Trusted by homeowners and pool professionals alike.
•CLEARS CLOUDY WATER FAST - Yellow Treat helps break down organic debris while enhancing pool clarity, so you get visibly cleaner water, faster.
•COMMERCIAL-STRENGTH RESULTS AT HOME - Skip the guesswork. Yellow Treat delivers pro-grade results fast and easy, helping you win the fight against yellow algae and enjoy sparkling pool water all season.

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$7.29

$14.99

-51%

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APPLIED BIOCHEMISTS

Applied Biochemists Pool 408622A Yellowtrine Swimming Pool Algaecide Cleanser, 3 lbs

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•BENEFITS: Quickly rids pools of mustard algae outbreaks
•USE: Swimming may be resumed several hours after treatment
•COMPATIBILITY: Works with all types of pools and all sanitizers including bromine, chlorine, salt water, ozone and minerals
•FEATURES: Destroy deposits without leaving a residue
•INCLUDES: One 3-lb container of Yellowtrine from Applied Biochemists

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$39.87

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Coral Seas

Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 x 4 Pounds

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•MULTI-PURPOSE: Raise the levels for chlorine, water hardness, and pH in your swimming pool giving you crystal clear water.
•INCREDIBLY STRONG: Due to its high percentage of chlorine, Super Shock is very effective and efficient for a quick chlorine boost.
•MIX BEFORE YOU FIX: Add this powder to a bucket of water before you add it to your pool. Add a 1 lb bag per 10,000 gallons of pool water.
•BEAT THE GREEN: Kill the algae in your swimming pool by adding 3 bags of shock per 10,000 gallons of pool water.
•WORKS BEST AT NIGHT: Maximize performance by adding this shock to your pool at night. Wait to swim 8 to 10 hours after application.

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$52.49

$55.98

-6%

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Coral Seas

Coral Seas Yellow Out Pool Sanitizer, 20 lbs

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Perfect for extremely green pools
•Add 2lbs per 15,000 gallons of pool water

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$126.98

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