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32-oz Pool Algae Prevention

Ratings & Reviews for HTH 32-oz Pool Algae Prevention

4.7
107
Review
 4.7 out of 5
107 Reviews


93% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this algae guard product for exceptional effectiveness in preventing and eliminating all algae types, with results visible within hours or minutes. Most reviewers highlight crystal-clear water, algae-free pools lasting up to three months, and the ability to swim immediately after application. Many appreciate the low-foam or foam-free performance compared to alternatives and the simple, consistent dosing. A very small number mention minor foaming or isolated dissatisfaction, but these are vastly outweighed by widespread satisfaction. Overall, reviewers consider it a reliable game-changer for pool maintenance.

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

No more green!

Would Recommend
September 5, 2022

From hthpools.com

works like a dream

Would Recommend

[This review was collected as part of a promotion.] This algae gard is just what we needed for our pool. We had a little problem at the beginning of the summer keeping our pool Chrystal clear and the ph levels right. We got this, tried it in our pool that was turning slightly green and it disapated the cloudy green making it clear again. I'd definitely recommend this to others. It worked great.

September 3, 2022

From hthpools.com

Quality product

Would Recommend

[This review was collected as part of a promotion.] So the HTH algae guard is definitely making a difference in the cleanliness of my pool. I use HTH shock first then the next day I add the algae guard and the sides and bottom of the pool clean up quickly.

September 2, 2022

From hthpools.com

Works well - just follow directions closely

Would Recommend

[This review was collected as part of a promotion.] So I was on vacation and my pump quit working during a storm. So of course I had algae and my pool was green once we returned. I used HTH to get rid of the algae and along with the salt pump (salt water pool) and shock - I was able to get my pool back to swim able shape within 3 days - which is awesome. I have used HTH products but never before the long acting algae killer - so I'm hoping for some relief longterm! One week so far and it is stil...

September 2, 2022

From hthpools.com

No algae, does the job.

Would Recommend

[This review was collected as part of a promotion.] We've been having exceptionally warm weather, and this has caused a new algae growth problem for us. This has helped address it, as it was new to us, and it has kept the algae gremlins at bay. I appreciate the swim immediately aspects to the product, as I worry it is too harsh to come into contact with. It has not created any skin or other concerns, and has been wonderful to have the algae under control. I'll continue to use it throug...

September 1, 2022

From hthpools.com

Works like it should

Would Recommend

[This review was collected as part of a promotion.] This is a great product. Well worth the money it only takes a few ounces per 10,000 gallons. This is one of the best algaecides I have ever used. It works great as a preventative and to clear up algae that is already growing.

August 31, 2022

From hthpools.com

Great packaging

Would Recommend

[This review was collected as part of a promotion.] I like how they have packaged these bottles. The other competitor has bottles that are hard to grab and hold. HTH has been around as long as I have had a pool and I'm sure long before that. Lol. I think they got it figured it out.

August 31, 2022

From hthpools.com

No algae!

[This review was collected as part of a promotion.] I used the product with the hopes of cutting down the amount of times I'd have to add Algae Guard to my pool. So far, so good! My pool has been free of algae for weeks now and it only took the one treatment. My old product had to be added weekly; god help you if you fogot! Highly recommended!

August 30, 2022

From hthpools.com

Brand you can trust

Would Recommend

[This review was collected as part of a promotion.] This HTH pool care algea guard ultra did an amazing job keeping the water clear and algea free. Living in the south east, the heat and humidity will turn the water bad right away and this really helped keep the algea under control.

August 29, 2022

From hthpools.com

Will kill algae

Would Recommend

[This review was collected as part of a promotion.]  I tend to sick with the copper based algesides because I know they work, during my last huge Algae bloom I tried everything else to get rid of it. The Ultra algeside is a copper based algeside and it's long lasting to prevent more blooms overtaking the pool. I didn't have to use nearly as much of the product as I thought, but my pool is rather large and it does require more product then most other algeside. It also says non foaming formula but...

August 29, 2022

From hthpools.com

Works great

Would Recommend

[This review was collected as part of a promotion.] After trying this for the first time in my spa tub, I can really see a difference in the water. It is a lot cleaner for a lot longer. I like that it doesn't foam up and make a mess. Very Nice. I am very happy with it.

August 28, 2022

From hthpools.com

Foamed

Would Not Recommend

[This review was collected as part of a promotion.] Pros: does clean and clear away algae from pool. Safe you swim in afterwards. Cons: due to the buildup, this left a layer of foam on the top. The next day the pool was clean and ready for swimming. So I wouldn’t swim in same day, especially if you had an aggressive algae problem.

August 28, 2022

From hthpools.com

Guard my pool from algae.

Would Recommend

[This review was collected as part of a promotion.] HTH Pool Care Algae Guard Ultra is a great product I used to prevent algae from forming in these hot summer days.With water temperate being 85,and the sun beating down on the water,is a great combo for algae to start growing.I used this product that will last up to 3 months to prevent algae growth. Can also swim 15 minutes after adding to pool.Keep the pumping running for several hours.

August 26, 2022

From hthpools.com

Algae Guard

Would Recommend

[This review was collected as part of a promotion.] I bought some HTH pool care Algae Guard to prevent Algae and it works . The directions are easy to follow and measure right amount to the gallon pool size you have and you can swim right away to. This is some real good stuff.

August 25, 2022

From hthpools.com

Maximum protection against algae

Would Recommend

[This review was collected as part of a promotion.] This HTH® Pool Care Algae Guard Ultra is the maximum guard and protection against algae in your pool. This is the long lasting formula that lasts up to 3 months. While I do like using this, I was already using another formula in my pool, so I started using this in my parents pool. I like how I can add this to their pool, as I am the one that maintains their pool, and I don’t have to add it every week. This works long term. It has a tendency to ...

August 23, 2022

From hthpools.com

Good-Bye algae!

Would Recommend

[This review was collected as part of a promotion.] We have a small above-ground pool. We got a lot of rain and we was having an issue with algae. So got the HTH Pool Care Algae Guard Ultra to see if it would get rid of the algae and it did. It worked wonderfully. It killed the algae and our pool was nice and algae-free. We saw improvement the next day. It took a few days to clear up fully but, Our pool is crystal clear now and is ready for the grandkids to have some fun. I plan on using this fo...

August 21, 2022

From hthpools.com

Great Features

Would Recommend

[This review was collected as part of a promotion.] My Review for HTH Pool Care Algae is a quality product! I had green and black algae in my pool and after using this product the algae is entirely gone! I would definitely recommend it to everyone who have algae in their pool!

August 21, 2022

From hthpools.com

Great stuff right here!!

Would Recommend

[This review was collected as part of a promotion.] This product is the absolute best you can buy especially if you have kids who can’t wait to jump in the water..it’s very fast acting. It works up to 3 months which is great! The best part is you can swim with it in the water.. no waiting!! I would definitely suggest this product to others.

August 15, 2022

From hthpools.com

clean water

Would Recommend

[This review was collected as part of a promotion.] to get a long lasting protection from algae use this to kill any and type of alga that might form in your pool it will last three months if use right you will be able to swim immediately or wait a couple of hrs depending on your pool care

August 12, 2022

From hthpools.com

No more green algae!!!!

Would Recommend

[This review was collected as part of a promotion.] I received the HTH® Ultimate Algae Guard, 1 Qt. We have a salt water system in our pool and I loved it because it acts very fast to destroy algae and leaves the water very clean in a short time. It is a very good product, I will continue to use it, no more green algae in my pool! I highly recommend it!

September 4, 2020

From hthpools.com