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Availability:
In Stock.
Arrives
Sunday, Nov 1
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At a glance
- Condition
- New
- Size
- 4-lb
- Model
- 1-2604B
- Weight
- 4 lb
- Item Form
- Granular
- Item Type Name
- for Pools
Features 8
- Cyanuric acid for pools
- Helps reduce chlorine loss
- Recommended cyanuric acid level is 40-100 ppm
- 6 ounces raises cyanuric acid level 10 ppm per 5,000 gallons of water
- Increases cyanuric acid level
- Decreases chlorine loss due to sunlight
- Reduce chlorine consumption up to 25%
- Improves the effectiveness of chlorine
Description
This product disperses rapidly to establish a chlorine protection quickly. It stabilizes pool water and extends the life of the disinfectant. Use a reliable test kit to determine the stabilizer concentration in the pool water. Follow the included chart to bring the pool water to the desired range of 40-100 ppm. If the pool is new, just refilled, or has no stabilizer; add 4 oz. of this product per 1000 gallons to give the desired range of 40-100 ppm. Add this product slowly into the skimmer, or if desired, premix in a pail of warm water and then add directly to the skimmer. Be sure the filter is clean. Recirculate the water continuously for 24 hours to dissolve completely. Always maintain the chlorine residual in your pool at 2.0-4.0 ppm and pH at 7.4-7.6.
Specs 15
| Brand | Pool Mate |
|---|---|
| Item Weight | 4 pounds |
| Item Form | Granular |
| Product Benefits | Cyanuric Acid, Reduces Chlorine Loss, Improves Chlorine Effectiveness |
| Brand Name | Pool Mate |
| UPC | 676215237946 |
| Global Trade Identification Number | 46 |
| Package Size Name | 4-Pound |
| Number of Items | 1 |
| Unit Count | 64 Ounce |
| Item Highlight | Chlorine Stabilizer, Concentrated Cyanuric Acid for Pools, Helps Chlorine Last Longer, 6oz raises CYA 10ppm per 5,000 gallons |
| Item Type Name | for Pools |
| Manufacturer | Robelle Industries |
| Model Number | 1-2604B |
| Manufacturer Part Number | FBA_1-2604B |
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Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 1
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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![Hot Tub Test Strips for Spas - 6 in 1 Water Test [100 Pack]](https://m.media-amazon.com/images/I/815TGc48B+L._AC_US500_.jpg)
Top Amazon Reviews
Most affordable way to increase your pool's CYA! Try my black sock method
Size: 4-Pounds
Last fall I converted my in-ground pool to salt water but I kept testing low chlorine levels despite the brand new chlorinator running constantly. After doing some research, I learned that I needed to add stabilizer (Cyanuric Acid/CYA) to protect the chlorine from burning off in the sun. At first, I looked into buying liquid stabilizer, but it was way more expensive and I read it can still be a pain to deal with (the acid thickens, settles and clings to the bottom of the jug). So I went with this granular version instead. It's definitely much more affordable, but does take a little more effort to add to the pool. To test how it dissolved, I tried pouring some granules directly into the skimmer basket as directed on the bag. But after an hour or two, it was all still sitting there undissolved, and I noticed some had also collected in my pump's strainer basket. Since I needed to add around 4-5 bags (12-16 lbs.) for my 40,000 gallon pool, I didn’t want to risk clogging the pump or filter. So instead, I poured the granules into a few thick black tube socks, tied the ends, and placed one sock in each skimmer basket overnight. The next morning, the socks had softened into a cream cheese-like texture. I firmly squeezed the socks and the softened CYA mixed instantly with the skimmer water. Once I had squeezed most of it out, I turned them inside out and dumped out the last clumpy bits and watched them dissolved completely. This only took a few minutes and worked perfectly. Best of all, I saved hundreds of dollars compared to the liquid jugs I nearly bought from the pool store! A few days later after I completed dispersing several bags, I retested my pool water and found the free chlorine levels had skyrocketed and the CYA increased to exactly the levels I expected. Great success! I will definitely buy this brand in the future (and will keep some tube socks handy!). Highly recommend! Pro-tip: use a black sock so you can easily visually confirm that you squeezed all of the stabilizer out!
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Reviewed in the United States on June 27, 2025 by Amazon Customer
Worked as good as the name brand, at lower cost
Size: 4-Pounds
The grains are small and dissolve easily. I had used a brand name 4-lb bag already and since my 20,000-gallon pool barely passed the PH of 8, I decided to use this one as well. It is very easy to use. I just poured the entire package in the skimmer well and let the pump run overnight. The whole process was straightforward. This acid was suitable for my saltwater pool. The price was very reasonable and actually 25% lower than the nationally known brand. Overall, I would recommend. It was effective and lowered the PH to below 8. It has maintained and is the acid is stable. The water has stayed clear.
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Reviewed in the United States on July 8, 2026 by Parviz L.
Works as intended at a great price
Size: 4-Pounds
This stabilizer did exactly what it was supposed to do, and the price is excellent. My CYA level had dropped to zero after a bacteria bloom caused by several decomposing frogs in the skimmers while I was away on vacation for a week. This created ammonia and left the water very hazy. After thoroughly cleaning and sanitizing the pool with liquid chlorine, I added this stabilizer following the recommended dosage for my 27,000-gallon pool. I added it gradually — 1 pound at a time into each of my two skimmers, waiting for it to fully dissolve before adding the next pound. I used a full 7 lb bag to reach about 35 ppm. I added 4 pounds on day one and the remaining 3 pounds the next day. I tested daily, and it took about 3 days for the CYA to fully register as it dissolves slowly. A few days later, I added another 4 lb bag to bring the level up to nearly 60 ppm. Overall, I was able to reach the exact CYA level recommended in the instructions at roughly half the cost of many competing products. Great value and effective results.
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Reviewed in the United States on July 31, 2026 by Andreas
Works fine
Size: 4-Pounds
Easy way to distribute is to fill pool skimmer sock tie it off hang from nylon string tied to a brick and place it in front of pool jet, it takes about 2 hours to dissolve.
Reviewed in the United States on July 12, 2026 by Marcia McKee
Works fast, works great!
Size: 4-Pounds
last year I discovered that pool chems from Amazon are just as good as pool chems from the pool store, just way less expensive. Opened the pool a couple weeks ago and my stabilizer had totally crashed. Went to Amazon and saw this at a great price and in a quantity (about 4lbs) that should last me a couple years. Got it next day, and within 24 hours my test strips say "OK for pool" and my chlorine levels aren't plummeting after baking in the sun all day. only used about 1/3 of the bag to bring my cyanuric levels from almost zero to good in my ~21K gallon pool that has zero shade. Ease of use: I will note that this doesn't really dissolve immediately in water. Instructions say to dissolve in warm water -- I added some to a bucket of 86 degree pool water and it really didn't dissolve. 86 must not be warm enough. what did work well was just pouring about a cup of the powder into my skimmer (with a skimmer sock) and it dissolved in 2-3 hours with the pump running. will definitely buy again when i need more!
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Reviewed in the United States on June 25, 2025 by Dean
great chemical
Size: 4-Pounds
great chemical to have on hand. Concentration is great, and super ease to use if you know what you are doing with your pool
Reviewed in the United States on October 2, 2026 by Molly Gerber
As advertized
Size: 4-Pounds
Works great. Verified with a pre and post test at Leslie's that this did exactly what it said it would. For everyone saying it take a long time to dissolve... Yes, it does. Every bag of stabilizer I have bought for the last 20+ years has taken a long time to dissolve. It's the nature of the beast.
Reviewed in the United States on July 3, 2026 by Steve F.
A third of it won't dissolve
Size: 4-Pounds
Been doing my own pool maintenance for +20yrs. Recently got a bag of this & at least 1/3rd of it by volume will not dissolve. Would not buy again.
Reviewed in the United States on July 23, 2026 by Rich B