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.From Green to Blue!
Would Recommend[This review was collected as part of a promotion.] Our 24,000 gallon pool tends to get away from us rather quickly. However, when the Algae Guard was added, we saw results quickly. The product is easy to use and not messy like some pool chemicals can be. Sure, there are generic products out there that are cheaper, but sometimes it pays to spend a little more for quality results.
From hthpools.com
This works well
Would Recommend[This review was collected as part of a promotion.] This Algae Guard is surprisingly easy to use. You follow the instructions on the back --and add as much as needed per gallon size of your pool. Then, simply pour it in and it does the rest! I had been having trouble with algae so this was the product I was searching for. So far we have sparkling crystal blue water with no signs of the algae returning. This product is intended to last and provide relief from algae for 90 days. So far that ...
From hthpools.com
Works well.
Would Recommend[This review was collected as part of a promotion.] Usually, the algae gets really bad after a few days if you go without mainenance for a few days. With this agae guard you can go for 2 weeks without trying to keep up. We all live busy lives and sometimes its hard to keep up with the pool.
From hthpools.com
No more green pool!
Would Recommend[This review was collected as part of a promotion.] HTH Ultimate Algae Guard works great! It has helped her our pool summer ready and handled the algae problem we had from not properly wintering our pool. It was easy to use and the directions are extremely easy and simple to follow.
From hthpools.com
Nice that it's non-foaming
[This review was collected as part of a promotion.] The thing about algaecide that used to bug me was the foam. I'm glad to have found Ultimate Algae Guard, because I can add it and don't have to deal with the questions about that foam all over the pool.
From hthpools.com
Consistent performance
Would Recommend[This review was collected as part of a promotion.] Ultimate Algae is by far the best product I’ve used for my pool Algae blooms. Every year we have fought the blooms with little success, until we started using this product which keep it in check! I highly recommend if you have a hard time keeping algae in control.
From hthpools.com
Crystal Blue Water - thanks HTH
Would Recommend[This review was collected as part of a promotion.] I got this HTH Ultimate to help get my pool in shape as the prior owner neglected it so badly. I was so impressed at how well it helped with the color and killing the algae. I would recommend this to anyone.
From hthpools.com
Needs to be larger.
Would Recommend[This review was collected as part of a promotion.] As noted in my other review, I have a very large pool. Approx 50k gallons. This small bottle came no where close to meeting my requirements. I did use the whole bottle, and it worked temporarily to get my color more blue, but alas, it was no use against heavy pollen and algae. If the bottle came in a variety of sizes, it would be perfect. Also, I would prefer the shape of the other containers with a handle. I felt like I was going to drop this ...
From hthpools.com
Algae's Worst Nightmare
Would Recommend[This review was collected as part of a promotion.] This just works. Period. Pour some in several spots around your pool with the pump running and you'll be algae-free for three months. I've tried several other products but nothing works like HTH Ultimate Algae Guard. Highly-recommend.
From hthpools.com
Great
Would Recommend[This review was collected as part of a promotion.] Great algae guard. We have only gotten to use it for a week,but so far it has helped with keeping algae out of our pool. This brand is a great brand to use for pool products, I am sure we will continue to fight algae from our pool constantly.
From hthpools.com
Will be using all year!
Would Recommend[This review was collected as part of a promotion.] I really had an issue with algae this past year due to well water and rain. After getting levels correct and putting in algae guard this year we are doing great! I couldn't be more excited to swim more this year!
From hthpools.com
works good
Would Recommend[This review was collected as part of a promotion.] I am a first time pool owner. I used this product and did not have any algae issues when combined with other normal pool maintenance. I have wasted loads of money buying chemicals to no avail, but a half bottle of this stuff and It really worked. I saw little improvement the next morining but over the next few days it looked better and better. I will be buying again.
From hthpools.com
Great product
Would Recommend[This review was collected as part of a promotion.] I got this product for our above ground pool. We live in the desert and keeping the pool algae free is a nightmare. Just had to figure out the right amount of Ultimate Algae Guard for our pool size and just put it right in the pool with the pump running. What I like is that I just put it in the water and don’t have to worry about anymore. All I need to do is vacuum the pool and I’m done.
From hthpools.com
Good Product for your pool!
Would Recommend[This review was collected as part of a promotion.] For those of you who have a pool, you know how hard it is to keep it from collecting algae in it. Follow the directions for adding this algae guard and it will definitely control the ph of your water and keep the algae from growing.
From hthpools.com
So far so good!
Would Recommend[This review was collected as part of a promotion.] Nice peace of mind! Added this in with my normal pool maintenance routine and so far it’s crystal clear. Having had to deal with algae blooms in the past, it is FAR easier to stay ahead of it and be preventative than try to fix it once things get bad! So this, for me, is one of those products that help me sleep a little better at night :-)
From hthpools.com
Algae Beware
Would Recommend[This review was collected as part of a promotion.] This has been a godsend in making sure that our pool stays algae free and clear. It has significantly improved the clarity of our pool and given me the piece of mind knowing that the algae is all gone.
From hthpools.com
Works great!
Would Recommend[This review was collected as part of a promotion.] Ever since resurfacing our pool we have been battling algae. This product was extremely easy to use and has kept the pool looking great. I was also relieved to see it wouldn't stain so we didn't have to worry about the new plaster.
From hthpools.com
Ultimate
Would Recommend[This review was collected as part of a promotion.] I like how it is called ultimate and also when I got this bottle to use for my pond . I like how easy it was so use and pour and not to hard to open as well as the directions are super clear and simple to read I can tell a little change in my pond great news
From hthpools.com
Algae Guard
Would Recommend[This review was collected as part of a promotion.] This is our 2nd time to set up ground up pool. First time we didn't use algae guard. This time we got this and we can maintain the pool very clean! I can let my kids play in the pool everyday and don't be afraid they get sick! So far very good product to use!
From hthpools.com
Great product
Would Recommend[This review was collected as part of a promotion.] I received this product the other day and used this product as soon as possible and I loved how it worked. I would definitely recommend this to all of my friends and family that have a pool and need to clean their pool.
From hthpools.com
