Prevents Algae

Defends against stubborn pool algae.


Clears Water

Built-in clarifier helps to maintain crystal clear water.


Salt Pool Compatible

Non-foaming formula is suitable for all pool types, including salt water pools.

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Maintain a Clear Pool

Your pool chemistry can change quickly. Test your pool water weekly to ensure your Free Chlorine level remains between 1 – 4 ppm.  Apply a preventative algaecide weekly to fight algae and keep your pool clear.

Maintain a regular cleaning regimen. Skim water surface, brush walls, vacuum and empty skimmer baskets at least once per week. Download the Clorox® Pool app on the Apple App Store or Google Play for expert water analysis and product and dosage recommendations.

This season, spend less time maintaining and more time enjoying your swimming pool!

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Product reviews

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Better than the rest

I’ve had a pool for 20 years. Every year I have trouble with algae. Until I found Clorox brand Fungicide I bought every brand I could find and had no results, fighting algae through July to September. Not so with Clorox brand. I use it weekly and I never have trouble with algae anymore.
Ease of Use: Effectiveness:

No Algae

It works, after weeks of Algae. Pour 1 galon and brush daily
Ease of Use: 5 Effectiveness: 5
Ventura county

It worked!

New pool owner, permasalt system (treat every 2 weeks) and we were in between treatments. Pool turned green after swimming all weekend, dumped the prescribed amount in (check the calculator from Clorox) at 730am and the pool was normal by 12pm. Definitely recommend using!
Ease of Use: Effectiveness:

Worked as described

I had a persistent algae problem and my (usually effective) shock wasn’t working. Followed the instructions on this product and the pool was clear the next morning… literally overnight. Note: the label does recommend combining this with a shock, when algae is growing, which I did.
Ease of Use: Effectiveness:


Small algae issue so I cleaned the pool/filter thoroughly, ph and chlorine were perfect, and added the Clorox-prescribed amount of this Algaecide with poor results. Literally nothing … zero effect on algae. You could just as well be adding blue food-colored water to your pool … it’d be just as effective. Just wasted my money on this … Usually you can trust Clorox to work as expected, but this particular product is worthless.
Ease of Use: Effectiveness:

best productt

Greate product , befor got to buy lots of thing for algee no any more with this product
Ease of Use: 5 Effectiveness: 5
jose Oscar
Puerto RIco

fast acting!

The Clorox Pool Algaecide and Clarifier worked to clear my pool very quickly this Spring. The pool went from green to clean in about a day and a half!
Ease of Use: 5 Effectiveness: 5

great product!

Oh my gosh this stuff is wonderful! Use it a lot – had lots of rain and this helps keep algae growth under control
Ease of Use: 5 Effectiveness: 5
shabby prairie

Not that strong

I used this product for weekly maintenace and still got algae. Granted, it was after heavy rains and my pool wasn’t holding chlorine. But, I prefer the heavy duty algaecide products to keep algae at bay.
Ease of Use: 4 Effectiveness: 1

So sad

I added to my pool and within 2 days my pool water became very cloudy, would not recommend this product.
Ease of Use: 5 Effectiveness: 1

Great product

Got the pool clear and the green gone in about 6 hours
Ease of Use: 5 Effectiveness: 5

Really helps with keeping the pool clear

After adding this to the pool and allowing the filter to run, the water is noticeably clearer and algae growth is slowed down considerably. Adding the product is fairly straightforward as well. I only need to poor it in along the perimeter of the pool and then rinse out the bottle with pool water before tossing it in the recycle bin.
Ease of Use: 5 Effectiveness: 5

Great 2 in 1 Product

In the past when opening the pool, I have had to use 2 different chemicals. I like that Clorox has combined both product in one package. I had to wait for the cooler northeast weather to move on to open my pool this year and I used this product at startup. I have had no issues with algae and the clarifier helped clear the small sediment from the mesh pool cover after opening. Trust the Clorox Brand and recommend using their products.
Ease of Use: 5 Effectiveness: 5

Fantastic Product!

I just opened the pool and added the algaecide with the clarifier and ir quickly cleared the water. I like that it has the clarifier in it.
Ease of Use: 5 Effectiveness: 5
Paula K

Algaecide & clarifier

Algaecide and clarifier should not be combined in the same bottle. The clarifier can make a sloppy mess in a smaller pool with an inadequate filter.
Ease of Use: 5 Effectiveness: 3


THE ALGAECIDE CLAIRFIER IS A GREAT PRODUCT And makes the water free from Algeria and the water clear and Sparkling… I recommend the product…..
Ease of Use: 5 Effectiveness: 5

Ease of Use: 5 Effectiveness: 5

Great product

Works really good killed all my algae great product
Ease of Use: 5 Effectiveness: 5

Pool Looks Reat After Using Algaecide & Clarifier

This product is very effective. I was having trouble controlling green algae and had some black algae as well. I used a high dose of Algaecide & Clarifier and followed up in 10 days with a maintenance dose. After vacuuming, the pool looks great. The water is crystal clear and the stubborn black algae seems better as well. I will continue with maintenance doses weekly.
Ease of Use: 5 Effectiveness: 5


Haven’t used this batch yet. Can speak from prior years experience that this stuff really works.
Ease of Use: 5 Effectiveness: 5

Keep the Green Away

This product as part of your weekly maintenance helps keep the water clear and inviting..
Ease of Use: 5 Effectiveness: 5

Two Great Products Combined Into One

I love the fact that the algaecide and clarifier are now in one great product. Getting my pool up and going for the season was easy!
Ease of Use: 5 Effectiveness: 4


Two for one works for me and it’s a lot cheaper then Pinch A Penny and works faster then there.
Ease of Use: 5 Effectiveness: 5


We use this product opening our pool for the first time of the yr. It works pretty fast, doesn’t cloud the water up, very easy to use. Then use it throughout the season for a maintenance to keep any algae from growing. Works fabulously!
Ease of Use: 5 Effectiveness: 5

Kills Algae quickly!

Living in the south we have severe challenges with algae due to pool being outside, and lots of trees. This stuff works great!
Ease of Use: 5 Effectiveness: 5

Best algaecide I use

I have a 25,000-gallon pool and algaecide is always a problem. But it has been less of a problem since I started using Clorox’s. What a difference
Ease of Use: 5 Effectiveness: 4

2 for 1 power

Excellent product for opening and maintaining pool water.
Ease of Use: 5 Effectiveness: 5

Good product

It worked good for pool opening. I don’t know if it will work as an Algeciras or not. I used as clarifier..
Ease of Use: 4 Effectiveness: 4

Used for Pool Start Up!

Well, it is that time again to start up the pool after the winter season – yes even in Florida! SInce we cover the pool during the winter we only have minimal algae to deal with on start up. This product along with the other “start up” products worked just fine to get our pool up and running. We also use the stabilizer, shock and ph increaser. Before we know it – we are up and running for the summer.
Ease of Use: 5 Effectiveness: 5

Beautiful clear water

Definitely clears the water and works on most algae, not on black algae. Would prefer if were less volume and same activity.
Ease of Use: 5 Effectiveness: 4

Great product.

Used as directed it is a great product. Keeps pool clear and also smells clean.
Ease of Use: 5 Effectiveness: 5

Helps to keep pool looking good.

I trust the Clorox brand products and it keeps the algae away and my water clear.
Ease of Use: 5 Effectiveness: 5

Great product

Product that does good for as long as I’ve used it.
Ease of Use: 5 Effectiveness: 4

Works Wonders

Helped kill algae from winter. Works quickly and effectively.
Ease of Use: 5 Effectiveness: 5

Great product. Does Double Duty!!.

Performs two tasks at once which used to take me two separate products
Ease of Use: 5 Effectiveness: 5

One product, two jobs!

I like this algaecide. i love that it is a two for one product. The product is non foaming, which is a huge plus, and is sometimes difficult to find in an algaecide. The clairifier works well as far as I can tell. My water was already in good shape, and is very clear.
Ease of Use: 5 Effectiveness: 5

Works Well

Works well. Keeps the pool clear and free of Alge.
Ease of Use: 5 Effectiveness: 5

I like it!

I first used this product about eight days ago. I had a bad algae bloom and had to shock it while using this. I had to add more after 72hrs but now my pool is clear. It is easy to use, just follow the directions on back and you will receive the results.
Ease of Use: 5 Effectiveness: 4

Amazing product

This is truly a great product it works immediately and effectively.
Ease of Use: 5 Effectiveness: 5

Best Algeacide in the market!

If you want to see the most sparkling pool water you have ever seen then just follow the directions and wait a few hours.
Ease of Use: 5 Effectiveness: 5

Awesome product!!!!

This product worked effectively to clear my pool of algea and made my pool water look Crystal clear.
Ease of Use: 5 Effectiveness: 5