Yellow Out
Coral Seas

Yellow Out

4.3 stars out of 72 reviews
(4.3)|
72 ratings
Yellow OutYellow OutCoral Seas YELLOWOUT Yellow Out Pool Algaecide 2 LbsYellow Out
Size:2 x 2 lb.

Key item features

  • Algae Cleanup: Yellow Out provides amazing cleanup results for yellow algae when used with an EPA-Registered chlorinating compound that targets green or mustard algae.
  • Chemical Composition: This product is a chemical breakthrough with no metals added, making it safe for use with all pool surfaces.
  • Performance Conditions: It remains effective even with high levels of cyanuric acid and is compatible with salt chlorine generators.
  • Rapid Action: Achieves algae cleanup quickly, transforming pools from green to clean within 24 hours without the need for brushing.
  • Usage Instructions: The recommended dosage is 2 lbs. per 15,000 gallons of water, with continuous filter operation for 24 hours post-application.
  • Application Precautions: Yellow Out should not be pre-mixed with chlorine or other chemicals, nor added directly into skimmer baskets or filter suction lines.
  • Algaecide Reduction: Regular use can help reduce the need for algaecides, which can potentially stain pool surfaces.
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Current price is $29.49
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  • Free shipping
  • Free 30-day returns

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Columbus, 43215
Arrives by Mon, Mar 16
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Sold and shipped by Dohenys PoolSuppliesSuperstore
4.453159041394335 stars out of 5, based on 918 seller reviews(4.5)
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Customer ratings & reviews

4.3 out of 5 stars
stars72 ratings43 reviews
How item rating is calculated
  1. 5 stars72% (52)
  2. 4 stars8% (6)
  3. 3 stars8% (6)
  4. 2 stars3% (2)
  5. 1 star8% (6)

Reviews summary

Pros
  • : Offers similar prices to other retailers.
  • : Quickly eliminates yellow algae from pool walls and water.
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Showing 1-3 of 43 reviews

Dec 10, 2025
Colleen
Item details
Size: 3.81" x 3.83" x 7.25"
Sold and shipped byDohenys PoolSuppliesSuperstore
5 out of 5 stars review

Verified Purchase

Struggled with my pool for years. Once I determined it was mustard or yellow algae this product made all the difference. Only issue was determining and measuring the correct amount as my pool is smaller and I needed less than the container. However, I figured it out and this solved my problems. Now my pool is looking fantastic, my water stays balanced and I use far less chemicals in my pool maintenance now. Great product

Helpful?5U80U97265C2430512209
May 28, 2025
TheGman
Item details
Size: 3.81" x 3.83" x 7.25"
Sold and shipped byDohenys PoolSuppliesSuperstore
5 out of 5 stars review

Verified Purchase

Yellow Out Algaecide Eliminator

Yellow Out Pool Algaecide is the best product on the market for eliminating that yellow Algae that accumulates in pools, it's easy to use, fast acting, price is very fair and great shipping time. It's easy to place an order using Walmart .com shopping on line.

Incentivized Review
Helpful?5U80U97265C2430512209
Nov 1, 2025
nicole
Item details
Size: 2 x 2 lb.
Sold and shipped byDohenys PoolSuppliesSuperstore
5 out of 5 stars review

Verified Purchase

Works

Follow the instructions 100% and it will work. Yellow algae gone and I have a 20x40ft pool. Make sure you have the shock and chlorine ready to go.

Helpful?5U80U97265C2430512209