chemicals

Kills Bacteria

99% Trichlor formula kills bacteria.

_0055_algaecide

Prevents Algae

Prevents unsightly pool algae.

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Maintain a Clean Pool

Your pool chemistry can change quickly. Test your pool water weekly to ensure your Free Chlorine level remains between 1 – 4 ppm.

Fill your feeder or floater with tablets and adjust output to bring chlorine to 1 – 4 ppm, test and refill as needed to maintain adequate sanitization. For skimmer application, add 1 tablet per 10,000 gallons to bring chlorine to 1 – 4 ppm, then add more tablets as needed to maintain adequate sanitization.

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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Individual plastic wrapping

The individual plastic wrap on the chlorine tabs degradates leaving an environmentally unfriendly mess
Ease of Use: 1 Effectiveness: 5
08/05/2019
Brnsvle
Frederick, MD

Good but why

Have been using this product and ones like it for years and they work great. My “why” is this … WHY are the tablets individually wrapped? The last three or four I have purchased have been like this …. what a pain to have to unwrap 10 per cycle of filling my auto feeder.
Ease of Use: 2 Effectiveness: 5
06/04/2019
Lngtdd
Florida

AMAZING PRODUCT

FOR 40 YEARS i HAVE BEEN FIGHTING ALL THE MAGIC NUMBERS TO BALANCE MY POOL THIS YEAR WE BOUGHT THE ACTIVE 99 AT BJ’S FOR THE FIRST TIME AND MY POOL HAS BEEN CLEAR, NO ALGAE, NO SLIME JUST COOL CLEAR WATER . I HAVE NOT EVEN HAD TO BACK WASH AND I USUALLY HAVE TO CLEAN THE GRIDS ONCE OR TWICE A SUMMER; THIS YEAR…NOT YET AND WE CLOSE IN 4 WEEKS. I DO NOT KNOW OR CARE WHAT IS IN IT BUT IT IS NOW MY PREFERRED PRODUCT
Ease of Use: 5 Effectiveness: 5
08/17/2018
BOBTHEWOODBUTCHER
NJ, SUBURB OF PHILADELPHIA

poor quqlity

Pool cloudy since I stared using Active 99. Tabblets were not wrapped and is overpowering when you open the container. Got a lot of rain and my pool turned completely dark green. Finally got that taken care of but still cannot get the cloudiness out. Had my water checked at a pool Pro and my water chemistry in fine. I firmly believe that the problem is Active 99. changing tablets today and I will know for sure.
Ease of Use: 1 Effectiveness: 1
09/24/2017
alightening56
Louisiana

Good Product

Good product! This is as good as any chlorine product on the market. I’ve used it all summer and have had no issues. My pool has been balanced, stabilizer level has been low, and with algae treatment I’ve had not algae problems.
Ease of Use: 5 Effectiveness:
07/24/2017
Nick

dispensing canister is awful

While the tablets are chlorine, the canister that contains the “in plastic wrapper” tablets is awful. Despite that I kept it closed moisture got in and the chlorine is starting to decompose. When I get more tablets out of the canister I have to hold my breath, grab the tablets (the plastic wrap is disintegrating as I do this) and get the tablets I need. I did not have this issue with a competitors product without individual wrapped tablets. Their lid screwed on and I kept that bucket for 1 1/2 seasons, never any trouble.
Ease of Use: 2 Effectiveness: 5
06/30/2017
RoboMonkey
Severn, Maryland

Highly recommended

This product is just as good as other chlorine brands.
Ease of Use: 5 Effectiveness: 5
06/22/2017
Teardrop0220

Best chlorine tablets

Best tablets I have used in the years of doing my pools
Ease of Use: 5 Effectiveness: 5
06/10/2017
RickS1955

Easy to obtain and use

The tablets in this tub are individually wrapped so they are much easier to handle than loose tablets and this also helps keep the chlorine smell down. Despite being individually packaged, some of the tablets are surprisingly broken. They are still usable, but you do end up with smaller bits in the dispenser which don’t last as long. Very convenient being able to purchase these from almost any store when needed.
Ease of Use: 5 Effectiveness: 5
06/01/2017
TonyT

Great Product from a Brand I trust

I use Clorox Bleach for my laundry and other Clorox cleaning products around my home so why not try Clorox for my swimming pool. I am extremely pleased with the product and trust Clorox for clean, safe swimming pool water. Easy to use and tablets chlorinate pool just fine. Highly recommend! Easy to carry pail, very convenient.
Ease of Use: 5 Effectiveness: 5
05/16/2017
OS1411

Great Product!

I just opened my pool, and of course the chlorine was low. I added the required amount of tablets and it quickly brought it up.
Ease of Use: 5 Effectiveness: 5
05/11/2017
Paula K

Good product

I have a salt system but always use chlorinating tablets when I open my pool. Once I got my water stabilized, I threw a few Clorox tablets in the skimmer and my floating chlorinator and my levels have been perfect. I really like the easy-open storage tub, but I’m not sure why the tablets are individually wrapped. Seems to be unnecessary and wasteful packaging. That’s the only reason I’m not giving five stars.
Ease of Use: 5 Effectiveness: 5
04/27/2017
AmyMcK

Ease of Use: 5 Effectiveness: 5
04/22/2017
tricia151

Love them

Easy to use and provides just enough clorine great product
Ease of Use: 5 Effectiveness: 5
04/17/2017
Sgtmilam

Much better, but

Last two years, I’ve hated the product packaging. The lid’s plastic hinge fatigues to the point that it finally fails, which opens up the bin so rain water leaks in and spoils the product. It also allows chlorine gas smell into the area. The biggest problem with using any chlorine tab is the noxious smell that burns your eyes and throat when adding tabs to the chlorinator. Clorox’s latest innovation is to individually wrap each tab. This eliminated the noxious smell and made the tabs safer to handle. Great idea! Now, please do something about the lid.
Ease of Use: Effectiveness:
04/16/2017
Mazination

I prefer tabs over power

I have a 22,000 gal. pool I put 3 tabs in the floater per week. they last at least that long and everything stays pretty stable, I usually add about .75 lbs. of Clorox PH UP as well.
Ease of Use: 5 Effectiveness: 5
04/16/2017
Campy

The best

The best your money could buy. Better than other branded or even generic tablets. Only issue is the container is rather small and I much prefer something in a 5 gallon drum.
Ease of Use: 5 Effectiveness: 5
04/12/2017
MUUM

Does Exactly What It Needs To

This product helps to perfectly balance by pools chlorine level. It helps to take the guesswork out of granules and slowly releases the chlorine over a long period of time. I like the fact that these last forever and slowly deteriorate so that I am not constantly having to replace them.
Ease of Use: 5 Effectiveness: 5
04/10/2017
FTT12

Great product

It does an excellent job love your products it does exactly what it says
Ease of Use: 5 Effectiveness: 5
04/10/2017
Randy

EXCELLENT!!!!!!!

GREAT product. I like it better then Pinch A Penny, it’s 10 times better. You sold me on Clorox Active99 and it’s a lot cheaper then Pinch A Penny. I like how each one is in a package by it self.
Ease of Use: 5 Effectiveness: 5
04/10/2017
ricehowjr

Clorinating tablets

We use these to help keep our chlorine levels stable, especially in the hot Texas weather where the sun seems to zap a lot of your products out of the pool. Use along side with the stabilizer to help keep it all it! Easy to use, works wonders!
Ease of Use: 5 Effectiveness: 5
04/09/2017
Whoababy23

Love Tablets

So easy to use – we have a set up on our pump that measures how much of the tablets are used. Cost effective and easy for the DIY pool maintainer!
Ease of Use: 5 Effectiveness: 5
04/09/2017
Alyson

These Clorox Active 99 tablets last a long time.

I previously used one pound chlorine sticks from another company because they lasted a long time in the skimmer and most tablets weren’t recommended for the skimmer. These Clorox tablets are 8 ounces and are for skimmer use. They last just as long or longer than the sticks I used before.
Ease of Use: 5 Effectiveness: 5
04/09/2017
Beege

Product works great!

Satisfied with the quality. Great results. What I expected from Clorox quality.
Ease of Use: 5 Effectiveness: 5
04/09/2017
Demp

Top notch tablets

Use 2 in my skimmer basket. Performs well and lasts for 3-4 days.
Ease of Use: 5 Effectiveness: 5
04/08/2017
Adam

Active 99 Chlorinating Tablets

The Active 99 Chlorinating Tablets are so much easier and safer than liquid chlorine. You just put them in your dispenser and let them chlorinate your pool. They contain sun stabilizer that makes the chlorine last longer in sunlight.
Ease of Use: 5 Effectiveness: 5
04/08/2017
sadickie

Clorox pool tabs

I used the tabs in my pool opening. The tabs made a strong bleach smell. I have used many types of tabs and these had a strong chlorine smell that if you got near it, it would burn your eyes. They also took way to long to dissolve and did not give a good level in my pool..
Ease of Use: 4 Effectiveness: 2
04/08/2017
Blondie

Great product!

The 3 inch tablets work exactly as expected. I have been using Clorox pool products for 2 pool seasons. One thing I like about them is that they seem to last longer than other brands. My pool seems very stable with their use. I use way less other products because my pool stays clear.
Ease of Use: 5 Effectiveness: 5
04/08/2017
rojolapp

Best Chlorine Tablets

I have been maintaining pools for well over 40 years. This is by far the best chlorine tablet product I have used. I have used other Clorox products for pool care for the past few years now, and I have been pleased with them. Clorox products are now the only ones I use. These tablet are well packaged, certainly easy to use, and they do the job. I use them in both my pool and my spa. And their cost is at or even below other brands. They are available at major retailers as well, making purchasing even more convenient. I am a satisfied customer.
Ease of Use: 5 Effectiveness: 5
04/08/2017
markjmal

Works fast!

I had been using another product. This one works faster and cleared up my pool better than the previous product. I’m a believer!
Ease of Use: 5 Effectiveness: 5
04/08/2017
shabby prairie

Works as expected

I use these in my floating clorinator. 3 tabs last several days, and keeps my chlorine in the perfect range.
Ease of Use: 5 Effectiveness: 5
04/06/2017
Fiveclines

Active 99 tablets

I like these better than the 6-in-one tablets I used last year. I never could balance my pool with the 6-in-ones.
Ease of Use: 5 Effectiveness: 5
04/06/2017
cynthia

Very Good Product

Works well very easy to use. Highly recommended for every day use.
Ease of Use: 5 Effectiveness: 5
04/05/2017
Macwho

Great Product

I started using this product when I first bought my house. The product works well and does what it is suppose to (keeps my chlorine levels stable). I have only use one other tablet product and the Clorox product works better.
Ease of Use: 5 Effectiveness: 5
04/04/2017
dwjr2305

USE THIS PRODUCT FOR A SAFE SWIMMING SEASON.

VERY GOOD PRODUCT THAT DELIVERS ABOVE EXPECTATIONS. I WOULD RECOMMEND TO ANYONE THAT WANTS A FUN AND SUCCESSFUL SWIMMING SEASON.
Ease of Use: 5 Effectiveness: 5
04/04/2017
TedM

grea product

Pool is nice and bright could not be easier to use
Ease of Use: 5 Effectiveness: 5
04/01/2017
mrtjbell

Good product

Haven’t used this season, but have used in the past. Liked the product.
Ease of Use: 5 Effectiveness: 4
03/31/2017
Frances

Great product

Started to use this product 2 years ago, made my life easier.
Ease of Use: 5 Effectiveness: 5
03/31/2017
tomms

Excellent product

Only suggestion is they seem to melt very quickly.
Ease of Use: 5 Effectiveness: 5
03/31/2017
Ztouch

Great product!!

The chlorinating tablets work great hand has kept my pools chlorine level perfect and they last longer than other products I have tried.
Ease of Use: 5 Effectiveness: 5
03/31/2017
Dholmes