Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Monday, Nov 10
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Features
- Pool Algae Treatment: Our Pool Algaecide and Clarifier is specially formulated to treat existing algae while providing long-lasting defense against stubborn growth, ensuring that your pool remains clear and algae-free for an extended period of time.
- Maintain Crystal Clear Water: Kills and prevents all types of swimming pool algae (green, mustard, black algae) for crystal clear swimming pool water.
- Non-Foaming Formula: Spend less time maintaining and more time enjoying your pool with this Swimming Pool Algaecide and Clarifier, which features a non-foaming formula.
- Suitable for Use in All Types of Pools: This product is proven to meet the needs of every pool owner, as it is compatible with all types of pools, including saltwater pools. You can trust our product to deliver exceptional performance and keep your pool water clean and clear.
- For best results, add to the deepest end of the pool with the filter running. Circulating pool water when applying chemicals helps disperse chemicals throughout the pool for maximum coverage
- Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.
Description
Clorox Pool&Spa Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1);43128CLX.
Brand: CLOROX Pool&Spa
Item Weight: 8 Pounds
Item Form: Liquid
Product Benefits: Controls Algae
UPC:
Brand: CLOROX Pool&Spa
Item Weight: 8 Pounds
Item Form: Liquid
Product Benefits: Controls Algae
UPC: 810821026246
Global Trade Identification Number: 46
Number of Items: 1
Unit Count: 128.0 Fluid Ounces
Product Dimensions: 6.35 x 6.35 x 11.13 inches
Item Weight: 8 pounds
Manufacturer: Clorox Pool&Spa
Item model number: 43128CLX
Is Discontinued By Manufacturer: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 10
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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Top Amazon Reviews
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
I can't believe that for several years, I thought brushing off yellow algae every other day was a fact of life for certain pool owners, like myself. That due to our location, proximity to certain trees, and whatnot, that mustard algae was a fact of life. It is not folks, ever since I discovered this product, I am on cruise control. But you simply can't pour this thing in without rolling up your sleeves and doing some initial clean-up to allow the algaecide to work its best. This was my recipe. 1. Scrub everywhere you see algae. You'll be shocking your pool after, but you want to scrub and clean so the chlorine can be most effective. Any spores that survive can respawn easily. So scrub, scub, scub!! 2. Clean your filter good!!! Check your pump basket. The clear lid of my pump basket had yellow and green spots, that's algae... clean it! 3. If you have an automatic pool filler. Take it apart and clean it, you'll be surprised at the gush of yellow cloudy water coming out. 4. After cleaning up and busting up all the algae, double shock your pool. Whatever is your normal shock dosage, double it. 5. After shocking, immediately apply the Clorox product. Follow the Clorox initial dosage for the algaecide & clarifier. They have two types of initial dosage, one where algae is present, and one where algae isn't. For me, of course algae was present, so I follow that dosage. 6. Now, let the filter run for 24 hours. I let mine run at 2000 rpm. My pool is about 13k gallons. 7. That's it... your pool will be sparkling the next day, and here on after, you just need to maintain your pool as you normally do, but with the addition of the clorox algaecide + clarifier WEEKLY dosage. The weekly dosage is much less than the initial dosage. For me, a bottle will last me FOUR weekly dosages. It has been about 6 months now, and I've been on auto-pilot. I haven't had to scrub any yellow algae from my walls. Understand that before this product, simply cleaning my filter and shocking DID NOT work. The algae would come back a week later. I always thought these types of products are a waste of money. That all I needed to do was clean my filter and shock, and if that didn't work, then algae was simply a fact of life for where I live. I was wrong!!! This is a supplementary product you need to battle algae, and it 100% works. I was expecting to still scrub normal non-yellow dirt and debris off my walls, but as it turns out, there is no such thing as "normal" dirt and debris. Turns out the algae spores were the reason why dirt and debris would stick. So you either have yellow walls, or clean walls, there's no in between. Debris shouldn't be sticking when you have no algae. Scrubbing yellow spots from my pool every other day was a fact of life for me, for a couple of years. Not anymore. 5-Stars. OCT 6, 2025 UPDATE: -------------------------- So I did my filter clean this past Sunday. I try to do it every 4 months. Prior to using algaecide and clarifier, the cartridge would be completely yellow/brownish. Yesterday, I only saw normal dirt, completely gray and black. So that means this product is working. During this time, I will also do a more thorough check of the automatic pool filler by disengaging the garden hose, and flipping it upside down to clean the inside. Again, prior to using Clorox, the white plastic floater would be very yellow. Yesterday, I did noticed yellow and green spots on the white plastic floater, not as bad as before, but you can tell it was starting to spawn. So the automatic pool filler is definitely the weak spot in the system, which makes sense. Debris can get under and inside the filler. Also, my robot skimmer isn't good at getting debris that's around the filler. And when I manually skim, using my foot, I would slide/move the filler along the edge of the pool, so I can get the debris that's surrounding it, but I don't flip it over. So for your weekly dosage routine, I also recommend taking this time to flip over your pool filler and give it a good cleaning as well. I'm still absolutely ecstatic about this product. After using it for half a year, the only spot to develop algae was this automatic pool filler, and it wasn't much. But now I'll check it every week, and completely eliminate this weak spot. OCT 19, 2025 UPDATE: --------------------------- Okay, so I can't emphasize enough... the automatic pool filler is 100% the weak point. At least in my case. In my last update, I said I would check it every week to eliminate this weak spot. But I was simply flipping it over, without undoing the garden hose, to observe the white floater container. If it had no green or yellow stains on it, I thought I was good. I just sprayed any grime on the container with my garden hose. I did the same today, but when I turned the water back on, a gush of yellow cloud came out. So obviously, something had been building inside. But again, not strong enough to cause yellow walls due to my weekly dosage. But now I must stress, every week when you do your weekly dosage, undo the automatic pool filler. Even if the container looks white, the spores are probably spawning at the connectors and garden hose head. Disengage these components and clean them. And when you connect the garden hose back, turn on the water, but do not put the filler in the pool yet. This is so if there is any gush of yellowy stuff, it won't go in your pool. This should be my last update. LOL! Good luck!
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Reviewed in the United States on September 24, 2025 by MOCTODNOZAMA MOCTODNOZAMA
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
This Clorox Pool & Spa algaecide and clarifier works really well! It helped prevent algae from forming and cleared up my pool water quickly. I noticed a visible difference within a day, and the water stayed clean and clear for longer. It’s easy to use, and I feel confident knowing my pool is protected against algae. Highly recommend for anyone looking to maintain crystal-clear pool water.
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Reviewed in the United States on September 25, 2025 by Elizabeth Schwartz
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
Bought just recenlty due to over abundance of green algae in 40K pool. Have pebble tech so makes it a bit tougher to get algae spores out of the nooks and cranny's. Similar to others, tried blasting with chlorine and pool filtration, but still problematic. Tried this (3 gallons) initial dose and 36 hours later, boom! Much clearer! Seems to be more effective than other treatments. Will keep using as maintenance! Highly recommended.
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Reviewed in the United States on September 20, 2025 by Bill Bradley
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
great quality product to keep pool under control. Keep water clear and algae down!
Reviewed in the United States on September 4, 2025 by David
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
easy to use, works pretty well
Reviewed in the United States on September 26, 2025 by mama mia
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
My pool was cloudy and the ph balance was off but after one use of this my pool was clear and beautiful. It is easy to use and steady chlorine level. I love that it’s affordable on Amazon.
Reviewed in the United States on October 30, 2025 by Elisha
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
This stuff worked great! Our pool was a green, algae filled mess when we moved in. I put probably 5 or 6 gallons of this in through the summer. It is crystal clear now. Very happy with this product, will continue to use smaller amounts to keep it clear.
Reviewed in the United States on November 1, 2025 by JW320
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
I bought the Clorox Pool&Spa Algaecide and Clarifier hoping to keep my pool crystal clear all season long, and in many ways, it delivered. The product did prevent algae growth effectively and cleared up the water noticeably within a few days. The size of the bottle means you get quite a bit for the price, which is great for larger pools, and it feels like a solid investment in pool maintenance. Applying it according to the instructions was straightforward and didn’t mess with the water balance too much. That said, I ran into a problem that a bunch of others seem to have faced too—the product sometimes leaves a cloudy residue in the pool after use. It happened with my application, and honestly, it was annoying to deal with. On top of that, my bottle had a weak cap seal causing a small leak during storage, which I think is a defect specific to my item, not all of them. It made me question the packaging quality control, and it added an unnecessary hassle on top of the cloudiness issue I had to clear up. I’d say this product is a cautiously recommended buy if you want decent algae control and can tolerate some extra pool maintenance afterward. The core function works, but the inconvenience of cloudiness and packaging defects drags the experience down. Three stars feels fair because it does the job, but it’s not as simple and flawless as the marketing suggests. If these issues were fixed, it could easily be a much stronger pick for pool owners.
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Reviewed in the United States on October 17, 2025 by AlexM