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HTH

HTH 67289 Swimming Pool Care Algae Guard Ultra, Swimming Pool Chemical, Long Lasting Formula, 32 fl oz

  • Based on 1,816 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Wesson Hardware
Arrives Sunday, Oct 19
Order within 15 hours and 36 minutes
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Style: Ultra Algaecide


Features

  • BENEFIT: Get long-lasting protection from extreme algae; This non-foaming algae control kills and prevents blooms of all algae types
  • OUR STRONGEST ALGAE CONTROL: Kills, prevents and protects against regrowth of heavy green, black and mustard swimming pool algae for up to 3 months
  • NON-FOAMING, FAST-ACTING: Add HTH Algae Guard Ultra directly to your swimming pool water and swim right away
  • COMPATIBLE WITH ALL POOLS: This non-staining formula is great for all swimming pools including vinyl-lined and saltwater systems
  • YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Algae Guard Ultra every 3 months; Works great with HTH Shock products

Description

Get long-lasting protection from extreme algae. Our strongest, non-foaming algae control kills blooms and prevents regrowth for up to 3 months. HTH Algae Guard Ultra is HTH's strongest algae control. It kills, prevents and protects against regrowth of heavy green, black and mustard swimming pool algae for up to 3 months. Its compatible with all pools. The non-staining formula is great for all swimming pools including vinyl-lined and salt water systems. It non- foaming and fast-acting formula means you can add HTH Algae Guard Ultra directly to your swimming pool water and swim right away! For best results, use HTH Algae Guard Ultra every 3 months in combination with other HTH products like HTH shock and HTH chlorine tablets.

Brand: HTH


Item Form: Liquid


Product Benefits: Controls Algae, Maintains Clean Sanitized Water


UPC:


Number of Items: 1


Brand: HTH


Item Form: Liquid


Product Benefits: Controls Algae, Maintains Clean Sanitized Water


UPC: 073187672896


Number of Items: 1


Unit Count: 32.0 Fluid Ounces


Product Dimensions: 2.25 x 4.23 x 9.25 inches


Item Weight: 2.7 pounds


Department: Unisex-Adult


Manufacturer: Innovative Water Care


Item model number: 67289


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Oct 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • As far as I can tell this stuff really works to prevent algae growth.
Style: Advanced Algaecide
When we put our pool up many years ago we didn't have any great options that kept it away from trees. I had to either deal with the leaves falling off the trees into the pool or cut the trees down. I was not going to cut the trees down. Every year it seems I am having to deal with at least two outbreaks of algae growth in the pool, possibly due to the leaves falling into the pool. Before I opened the pool this year I did some research on preventing algae. What I found was make sure the pool water is stabilized, chlorine level is always kept at the proper level and all other required chemicals are kept at their proper level. I've been doing that every year but still got algae. This year I decided to use an algaecide along with regular chemical maintenance. I followed the instructions for initial treatment for my pool size and added that amount. I'm also adding 2 ounces to my 15,000 gallon pool every 5 days. A bit more than recommended, but to date I have not had any algae problems. And now that I said that I'll probably have an issue. :-) But it's getting late in the season for where I live, we close the pool right after labor day, and so far no issues with algae. I'm going to attribute my lack of algae growth to this product. The addition of this algaecide is the only thing that's changed from previous years when I was having an algae problem. And it's been hot this year and heat typically aids in algae growth. Product seems to be working well for me. It's worth a shot if you have algae issues. ... show more
Reviewed in the United States on August 15, 2025 by JSF
    • This stuff WORKS!!!
Style: Advanced Algaecide
I've tired so many different products to kill algae in the pool. This stuff is amazing and super concentrated. One bottle can last a few months and keep your pool algae free.
Reviewed in the United States on August 27, 2025 by Michael P. Gleeson Md
    • It Works
Style: Advanced Algaecide
There are many resources on the Internet claiming that yellow mustard algae can be eradicated simply with high dose shock treatments, but in my experience this never works and is a huge waste of time and money. This product works. I add a small amount once a week and have seen no trace of the algae since. I'll continue to use it. ... show more
Reviewed in the United States on August 16, 2025 by stubee5150
    • Leaking bottles
Style: Advanced Algaecide
This is a very good product. Works better than others that I have tried. However one of my ordered was undeliverable it leaked so badly and the next one that I received was leaking all around the bottle.
Reviewed in the United States on August 1, 2025 by Dianne T. Gordon
    • Product worked great!
Style: Advanced Algaecide
Crystal blue pool but noticed a few stubborn black algae spots show up. Tried a couple different products with no results. Algae got worse. Had to use the whole bottle, two different treatments a couple days apart but it worked perfectly. Now I can finish getting the pool swim ready.
Reviewed in the United States on July 21, 2025 by Jeanifer C.
    • Algae Killer
Style: Ultra Algaecide
I thank the gentleman that steered buyers to this product. It’s likely my fault for not maintaining my pools chemistry balance, but each year I get these spots that I believe is mustard algae. Chlorine resistant yellowish looking spots that I just couldn’t get rid of. This product has worked to stop them. I may have a few small residual spots after treatment but I need a new plaster job anyway. I have a small waterfall and get very little sudsing, can swim within 24 hours and don’t turn green like someone may have mentioned. I keep my dog (who drinks pool water) away until I’ve added more water to the pool or it rains. A very good product to fight algae when you’ve let your guard down! ... show more
Reviewed in the United States on August 29, 2025 by Old Beginner
    • Excellent
Style: Advanced Algaecide
Keep my pool clear. 100 % Satisfied.
Reviewed in the United States on August 10, 2025 by Amazon Customer
    • Worked Well
Style: Advanced Algaecide
I have a 35,000 gallon pool and had green algae forming in several places. This knocked it out in less than 36 hours. It did foam for a few days but may be that I added too much. I would definitely buy this again for algae.
Reviewed in the United States on August 13, 2025 by Eric

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