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32-oz Pool Algae Prevention

Ratings & Reviews for HTH 32-oz Pool Algae Prevention

4.5
173
Review
 4.5 out of 5
173 Reviews


89% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The product is generally effective at controlling and preventing algae growth, quickly clearing up various types of algae and leaving the pool water clear. It is easy to use and a little goes a long way. The product works well even in conditions that promote algae growth. However, some customers had mixed experiences, with a few finding it created excessive foam or didn't fully eliminate their algae issues. Overall, the majority of reviews indicate the product is a reliable and convenient solution for maintaining a clean, algae-free pool.

Customer review summary generated by AI, including incentivized reviews.
173 Customer Reviews

Great product

Would Recommend
September 5, 2025
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Algae

Would Not Recommend

Doesn’t work 100%, had to shock pool again.

August 7, 2025
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Great

Would Recommend

Helped to clear the visible algae from my pool overnight

July 27, 2025
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it worked once, i thought, but didn't need again

Would Not Recommend

I have used this in the past, but was told I didn't need it and to return it if possible

July 18, 2025
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Clear pool

Would Recommend

works great

June 24, 2025
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Used with shock

Would Recommend

Helped to quickly clear the pool up, when used with the shock

June 20, 2025
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Cleans water good

Would Recommend

Works good in my water fountain

June 20, 2025
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Green gone

Would Recommend

seemed to work as it said, i noticed some green when sweeping the pool bottom, so got some of this, added 4 oz as said, and it was gone the next day. no sign of any algae, I used it again when i noticed a few spots felt a little slick in my above ground 18' pool. there are so many to choose from, glad I got this one.

June 16, 2025
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Makes for a clean pool

Would Recommend

Went out of town for a week and came home to algae in our pool. Found this at Lowes and was pleased that it was on sale for a relatively deep discount - especially compared to the pool store. I typically treat the pool all summer long, so I bought four bottles to cover this summer and probably most of next. The price of four bottles was about the same as 1.5 bottles from the pool store.

June 12, 2025
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HTH Algae Prevention

Would Recommend

I have used this in our pool and had very good results. Since it is concentrated, a little goes a long way.

June 6, 2025
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Doesn't work

Would Not Recommend

Makes foam in the pool and hot tub. Doesn't really kill algea

May 16, 2025
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Works Well

Would Recommend

[This review was collected as part of a promotion.] I really like this product. It is fast, efficient, and easy to use. My best friend has a pool and was quite happy when I suggested she also use this product. I love the neat packaging with succinct and pleasant writing. I especially love that it eliminates that green buildup.

October 26, 2022

From hthpools.com

Pool chemicals

Would Recommend

[This review was collected as part of a promotion.] My wife & I went on vacation and didn’t have anyone to take care of our pool while we were gone. When we returned the pool water had turned green. So we added some HTH algae guard Advanced along with HTH shock to the water & let it run through the night. In the morning the we were able to go swimming after vacuuming. We were very satisfied

October 6, 2022

From hthpools.com