Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)
Condition: New
Buy Now, Pay Later
As low as
$3
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – 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, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. 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
30-day returns
Learn more
FREE 30-day refund/replacement
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.
Arrives
Tuesday, Sep 1
Recently Viewed
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
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 Name: CLOROX Pool&Spa
UPC: 810821026246
Global Trade Identification Number: 46
Number of Packs: 1
Number of Items: 1
Unit Count: 128 Fluid Ounces
Included Components: 128 oz of Algaecide+Clarifier
Item Type Name: Pool Algaecide
Manufacturer: Clorox Pool&Spa
Model Number: 43128CLX
Manufacturer Part Number: 42128CLX
Item Form: Liquid
Product Benefits: Controls Algae
Item Weight: 8 pounds
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
I’ve used another algaecide with the same active ingredient for years with great results. I tried this Clorox Pool product because it costs about a third of my usual brand, though it’s only 6% concentration compared to 30%. It’s been a good solution for me. Despite being less concentrated, it works fine for routine weekly maintenance at a much lower cost. I wouldn’t use the 6% version for opening the pool in spring—I still prefer the 30% product for that. But once the pool is balanced and established, it’s more than sufficient for my 14,000-gallon in-ground gunite pool. Note: after heavy rain, runoff, pollen, or early signs of algae, when I just add an extra dose, my pool does require using the entire bottle. It contains no chlorine and combines an algaecide with a clarifier to help prevent algae and improve water clarity. As a liquid, it dissolves easily. Overall, it’s a decent value for ongoing maintenance --once the pool is already up and running.
...
show more
Reviewed in the United States on July 29, 2026 by Elsact
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! MARCH 16, 2026 UPDATE: ------------------------------- Bi-Monthly dosage schedule?? Promise! This will be my last update. But I wanted to share an observation. About 3 weeks ago in Southern California, it was very windy, and a lot of leaves got in my pool. In these 3 weeks, I was slipping. Too lazy to clean the pool, and my robot was under the pool out of battery during this time too. LOL! I did not keep up with the algaecide dosage either. Truth be told, even prior to these 3 weeks, I wasn't dosing my pool weekly, it was more like every other week, and then this past weekend made it 3 weeks without dosage. To my surprise... still no algae. My pool was a mess, but still no algae. So what I'm saying is, you may get away with not dosing weekly. At the beginning, I dosed according to instructions, and one bottle lasted me one month. I think I will do it bi-monthly now, so that a bottle will last for 2 months. Like I said, I had tested bi-monthly prior to this 3 week stretch, but I wasn't sure. Now that I've seen that after 3 weeks of zero maintenance and a pool full of dirt and leaves, and I still have no yellow algae... I think the bi-monthly schedule is a keeper. Now go stretch your dollar!
...
show more
Reviewed in the United States on September 24, 2025 by MOCTODNOZAMA
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
Helps keep the pool sparkling clean. Just pour in, run the filter, and then repeat each week to maintain. It has definitely helped reduce algae growth. Would definitely purchase again and will when we need more.
Reviewed in the United States on August 15, 2026 by TruthBeTold
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
This didn’t work well to kill the algae had to get a stronger one to kill the green algae, the clarifier works well at getting rid of the hazy look.
Reviewed in the United States on August 19, 2026 by M Bro
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
I used this Algaecide product to open my pool this year. It worked fantastic and now I use the whole product line. Quality products at a reasonable price.
Reviewed in the United States on August 4, 2026 by deandaniell
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
OK, just bought this to clear up my pool and I’ve used it every year and every time this is what I use but for some reason this bottle I got is a light blue color like it should be, but it has no odor. It does not smell you can stick your nose right up to it and it does not smell like anything what’s up with that? Did I get a bad mix? I put it in the water. Nothing happens. I still got the little slippery algae growing. It does nothing.
...
show more
Reviewed in the United States on June 9, 2026 by Mark L
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
It is what it is, and it works. A little pricey
Reviewed in the United States on July 31, 2026 by Barbie Austin
Size: 128 Fl Oz (Pack of 1)
Style: Pool Algaecide
My go to for clean clear pool water. I have a salt pool. The heat in Fl causes algaes of different kinds. When I use this weekly as a preventive, I have clear water. When I ran out and didnt buy more, I saw the algae return within 2 weeks. Then the cost to balance the pool with chemicals is a pain and I can't swim for 3 days., due to added chlorine. The cost to buy this and use it weekly outweighs the cost of chemicals.
...
show more
Reviewed in the United States on August 20, 2026 by Mary-Jo A. Dionne