Search  for anything...
HTH

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

  • Based on 1,679 reviews
Condition: New
Checking for product changes
$37.95 Why this price?

Buy Now, Pay Later

As low as $9 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Wesson Hardware
Arrives Jul 7 – Jul 17
Order within 17 hours and 44 minutes
Available payment plans shown during checkout

Recently Viewed

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: 2.75 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: Jul 7 – Jul 17

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Incredible Results!!!
Style: Advanced Algaecide
Won’t use any other product. I have an older pool & the plaster was looking like it was getting a green tint to it, I have redwood trees around it and I thought maybe I was seeing shadows of the trees making it look like a green tint as well. WRONG this product made the water & plaster so clear. Clearer than I’ve seen it in years, it actually looks blue again! A must buy…… ... show more
Reviewed in the United States on June 15, 2025 by KB
    • Works for months at a time
Style: Ultra Algaecide
My experience has been that this product works for 3-4 months minimum per application, which is awesome in my opinion. If it's not working like that, your have other issues with the chemistry in your pool that you need to address first. I also, unfortunately, know this from experience. Get your total alkalinty, calcium hardness, and chlorine stabilizer levels right and this stuff will work for ages. I've had a week here and there where I was lazy about chlorine, and it dropped pretty low but I still didn't get ANY algae, which was an issue before I started using this stuff. This review is specifically for HTH 67289 (the "Ultra", not the "Advanced") which contains copper sulfate, the magic ingredient. ... show more
Reviewed in the United States on May 1, 2025 by Matt F.
    • Excellent product!
Style: Advanced Algaecide
Review Image by Ye Jin Ye Jin
Review Image by Ye Jin Ye Jin
The mustard algae grew fast after entering the summer time, it's highly pool shock and chlorine resistant, just give this product a shot. It worked! Used it with the clarifier according to the instruction, just needs 4-5 days my beautiful pool came back!
Reviewed in the United States on May 28, 2025 by Ye Jin Ye Jin
    • Kills alge instantly
Style: Advanced Algaecide
It instantly kills the green alge in the pool, it does however make the pool cloudy.
Reviewed in the United States on December 7, 2024 by Jamie
    • Buy it, it works great
Style: Advanced Algaecide
This is the fastest and best algae killer I’ve used and I’ve had my in ground pool for 20 years
Reviewed in the United States on May 22, 2025 by chris southern
    • Concentrated and works well.
Style: Advanced Algaecide
Although the price would seem to be high the reality is it is concentrated and you need a lot less as compared to other algaecide products that are typically sold in the gallon size. This is a better buy and works well.
Reviewed in the United States on May 4, 2025 by la
    • Great Algae Kill.
Style: Ultra Algaecide
Greatest stuff on planet earth! Clear, Clean Water! It was cloudy all summer, if there’s white algae, couldn’t get rid of it, end of summer found this and dumped 2 bottles into the pool and crystal clear! Bought more and am ready for this summer!
Reviewed in the United States on May 1, 2025 by Trent
    • Working good in a very old gunite pool
Style: Ultra Algaecide
I used this in my pool yesterday and it seems to really be doing it's job killing off the algae. I have an almost 50 year old pool and have issues every year and this seems to be really helping!
Reviewed in the United States on April 30, 2025 by Melissa M. Spahr

Can't find a product?

Find it on Amazon first, then paste the link below.