Enjoy fast, free delivery, exclusive deals, and award-winning movies & TV shows with Prime
Try Prime and start saving today with fast, free delivery

FREE delivery Monday, May 13. Order within 19 hrs 56 mins

Select delivery location

In Stock

$$171.45 () Includes selected options. Includes initial monthly payment and selected options. Details

Enhancements you chose aren't available for this seller. Details

${cardName} not available for the seller you chose

${cardName} unavailable for quantities greater than ${maxQuantity}.

Ships from

Amazon.com

Ships from

Amazon.com

Sold by

Amazon.com

Sold by

Amazon.com

Returns

Non-returnable due to hazmat safety reasons

Returns

Non-returnable due to hazmat safety reasons

This item is non-returnable due to its composition that makes it regulated for transportation, but if the item arrives damaged or defective, you may request a refund or replacement.

Read full return policy

Payment

Secure transaction

Payment

Secure transaction

We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

Details

Add a gift receipt for easy returns

FREE delivery Monday, May 13. Order within 19 hrs 56 mins

In Stock

Deliver every:

$$171.45 () Includes selected options. Includes initial monthly payment and selected options. Details

Enhancements you chose aren't available for this seller. Details

${cardName} not available for the seller you chose

${cardName} unavailable for quantities greater than ${maxQuantity}.

Ships from and sold by Amazon.com

Other sellers on Amazon

New (2) from $169.99 & FREE Shipping

Robelle Chlorine Tablets 3 InchRobelle Industries

Image Unavailable

Image not available for
Color:

To view this video download Flash Player

VIDEO

Robelle 1420M Chlorine Tabs Pool Sanitizer, 20-Pounds

Visit the Robelle Store

4.5 1,542 ratings

$171.45 $0.54 per Ounce

Available at a lower price from other sellers that may not offer free Prime shipping.

Size: 20-Pounds

Style: Chlorine Tabs

{"desktop_buybox_group_1":[{"displayPrice":"$171.45","priceAmount":171.45,"currencySymbol":"$","integerValue":"171","decimalSeparator":".","fractionalValue":"45","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"jFWVKeQPZQZTl%2FQLCdl%2Btk6sz9MbEpcyhrskO41x2mtXta%2Fy%2B1XH9iPkjvMqJ9J9xtzJ8NTdYaRAXMIRV0bwe04yBQZUyvXdhCcmTVEDor%2F8V6646pMwpyKoNDkQyjFuWQU9JEtQ5N84NI6JsC6qMA%3D%3D","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}, {"displayPrice":"$171.45","priceAmount":171.45,"currencySymbol":"$","integerValue":"171","decimalSeparator":".","fractionalValue":"45","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":null,"locale":"en-US","buyingOptionType":"SNS","aapiBuyingOptionIndex":1}]}

Purchase options and add-ons

Brand	Robelle
Item Weight	20 Pounds
Item Form	Tablet
Product Benefits	Chlorine Sanitizer, Controls Algae, Kills Bacteria, Destroys Contaminants, Metal Stain Preventer, Corrosion and Scale Preventer See more

About this item

Sanitizer, clarifier, stain inhibitor, algae control, descaler, sunlight protector all in one slow-dissolving tab
2 tablets per 10,000 gallons of water
Maintain the pH at 7.4-7.6 and total alkalinity at 80-130 ppm
All-in-1 swimming pool chlorinating tabs for routine use in automatic chemical feeders or floaters
94.05% Trichloro-S-Triazinetrione (84.65% available chlorine)
Reduces the need for additional chemicals
Each individually wrapped tab weighs 8 ounces
20 pound container (40 tabs)

Customer ratings by feature

Easy to use

4.6

Longevity

4.1

Value for money

4.0

See all reviews

Report an issue with this product or seller

Frequently bought together

Robelle 1420M Chlorine Tabs Pool Sanitizer, 20-Pounds

$171.45 ($0.54/Ounce)

Get it as soon as Monday, May 13

In Stock

Ships from and sold by Amazon.com.

7-Way Pool Test Strips, 100 Quick & Accurate Pool and Spa Test Strips, Pool Water Test Kit - Chlorine, Bromine, pH, Hardness,

$9.49

Get it as soon as Monday, May 13

In Stock

Sold by JNW Direct and ships from Amazon Fulfillment.

DryTec 1-1901-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack

$94.99 ($0.25/Ounce)

Ships from and sold by Amazon.com.

Total price:

To see our price, add these items to your cart.

Try again!

Details

Added to Cart

Some of these items ship sooner than the others.

Show details Hide details

Choose items to buy together.

4,705
in Swimming Pool Chlorine
3 offers from $54.00
2,862
2 offers from $64.91
5,338
1 offer from $119.76
938
Amazon's Choice
in Swimming Pool Chlorine
18 offers from $189.99
2,757
4 offers from $27.43
1,027
2 offers from $194.99

From the brand

Robelle Pool Chemicals

Superior, dependable, affordable swimming pool products.

Since 1973

Step 1: Balance

Visit the Store
Step 2: Sanitize

Visit the Store
Step 3: Shock

Visit the Store
Step 4: Algae Control

Visit the Store
Further Maintenance

Visit the Store

Product information

Product Dimensions

14 x 14 x 14 inches

Item Weight

20 pounds

Manufacturer

Robelle

ASIN

B01CP5RK3C

Country of Origin

USA

Item model number

1420M

Customer Reviews

4.5 1,542 ratings

4.5 out of 5 stars

Best Sellers Rank

#19,656 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#159 in Swimming Pool Chlorine

Is Discontinued By Manufacturer

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Feedback

Would you like to tell us about a lower price?

Looking for specific info?

Product guides and documents

User Guide (PDF)

Product Description

Pool sanitization with 3 Inch Tablets. For use in feeders or floaters. Kills bacteria and controls algae, clarifies, prevents metal staining and corrosion, and reduces scale formation. A) Important Notes: 1. Shock your pool every week. 2. Sunlight, rainfall, temperature, number of swimmers and frequency of pool use affect the rate of chlorine residual loss. Adjust cleaning and chemical maintenance accordingly. 3. Use this product in an automatic feeder or floater. 4. Do not add other chemicals into the feeder or floater where this product. 5. To avoid damage to pool surface or materials do not allow product to come in direct contact. Do not throw tablets directly into pool. B) Before your begin: 1. Ensure all pool equipment is working. Adjust stabilizer levels to 40-100 ppm with a Stabilizer. 2. Test the water's pH, alkalinity, and calcium hardness and adjust to the correct level. Adjust pH to 7.4 - 7.6. 3. Check the free available chlorine level and adjust to 2-4 ppm by adding a granular chlorinating product. C) Start-Up: 1. If water is cloudy or green, superchlorinate pool with appropriate shock product until pool is clear. 2. Add 16 ounces of this product per 10,000 gallons of pool water to feeder or floater and then test for the free available chlorine level (allow water to circulate at least 4 hours before testing). Adjust the feeder or floater following manufacturer's instructions to establish a free available chlorine level between 2-4 ppm. 3. When free available chlorine level is adjusted to 2-4 ppm, add an algaecide. D) Maintenance: Add 16 ounces of this product per 10,000 gallons of pool water per week, or as often as needed, to the feeder or floater to maintain a constant free available chlorine level of 2-4 ppm. Reentry into treated swimming pools is prohibited when free available chlorine levels are above 3 ppm due to risk of bodily injury.

Compare with similar items

	This Item Robelle 1420M Chlorine Tabs Pool Sanitizer, 20-Pounds	Recommendations In The Swim 3 inch 5-in-1 Super Multi-Tabs – Swimming Pool Sanitizer – Chlorine - Algaecide - Stabilizer - Clarifier - 24 Pounds	dummy Aqua Pura Chlorine Tablets for Swimming Pool,3" Pool Supplies, Individually Wrapped Stabilized Chlorine Tablets, Long-Lasting, Slow Dissolve,Kill Bacteria,UV Protected,90% Available Chlorine,25 LB	dummy C3... C3 3'' Stabilized Chlorine Tablets for Swimming Pool and Spa, Individually Wrapped, Slow Dissolving, 50 lbs, 204550	dummy Leslie's 3-Inch Jumbo Chlorine Tablets for Swimming Pools - Individually Wrapped Stabilized Sanitizer Tabs - 99% Trichloro-S-Trianzinetrione, 90% Available Chlorine - 35 Pounds	dummy C3... C3 3" Stabilized Chlorine Tablets for Swimming Pool and Spa \| Individually Wrapped \| Slow Dissolving \| 25 lbs
	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart
Price	$171.45	-5% $174.79 List: $183.99	-6% $129.69 List: $138.69	$194.99	$219.99	$106.04
Delivery	Get it as soon as Monday, May 13	—	—	Get it May 10 - 13	Get it May 9 - 10	Get it as soon as Friday, May 10
Customer Ratings	4.51,542	4.6634	4.639	4.61,027	4.6269	4.61,027
Easy to use	4.6	4.5	4.3	4.5	4.6	4.5
Longevity	4.1	4.2	4.2	4.1	4.4	4.1
Value for money	4.0	3.9	4.3	4.2	3.7	4.2
Sold By	Amazon.com	In The Swim Pool Supplies	Aqua Pura Products	Four Seasons Pool Supply	Pool Supply World	BackyardPoolSuperstore
form	Tablet	Tablet	Tablet	Tablet	Tablet	Tablet
weight	20 pounds	28.25 pounds	25 pounds	50 pounds	38 pounds	25 pounds

Customer reviews

4.5 out of 5

1,542 global ratings

How customer reviews and ratings work

Customers say

Customers like the color, performance, and ease of use of the pool spa water treatment. They mention that it keeps the pool sparkling clear, works well, and is easy to use. Customers also appreciate chlorine, and clarity. That said, opinions are mixed on quality and value.

AI-generated from the text of customer reviews

78 customers mention76 positive2 negative

Customers are satisfied with the performance of the pool spa water treatment tablets. They say that they work well, do a phenomenal job, and are as good as the expensive products. Some customers also mention that the tablets last and are perfect for keeping pool water sparkling clean.

"I have been using this product for 5+ years and it works great, rarely do I need to add any other chemicals to control my pool." Read more

"I liked the product it works well for my pool and keeps it clean" Read more

"...Those tablets are amazing." Read more

"Hands down the easiest and best pool tablets I've ever bought! A week of rain and just tablets in my floater." Read more

33 customers mention31 positive2 negative

Customers are satisfied with the clarity of the pool spa water treatment. They mention that it surpassed all other brands and keeps their water looking crystal clear. Some say that the tabs don't dissolve as quickly as other brands, so they don''t have problems with clarity or algae blooms.

"...have to purchase the shock, clarifier or algaecide and my pool is crystal clear. It also takes me less time to vacuum/maintain...." Read more

"...if I forget to fill up the chlorinator for a couple of days the water stays perfect...." Read more

"...Although the product has done a fantastic job of keeping our pool water clear, it has also filled our pool with an outrageous amount of copper...." Read more

"...THE WATER NEVER EVER TURNS GREEN\YELLOW!!! It is always crystal clear, even when we open it in the spring and it is full of leaves\debris...." Read more

14 customers mention14 positive0 negative

Customers are impressed with the blue specks in the tablets. They say it makes the pool water sparkle clear.

"...It contains everything the pool needs. THE WATER NEVER EVER TURNS GREEN\YELLOW!!!..." Read more

"...My pool is very clean and clear just by using these tables...." Read more

"...So far used 3 tabs in about 6 weeks. Pool water looks great." Read more

"...Don't get me wrong, really love this product for the pool, keeps it nice and sparkling clean. However, this time, disappointed in how it arrived...." Read more

14 customers mention14 positive0 negative

Customers find the pool spa water treatment easy to use. They say it's hassle-free, easy to handle and dispense, and the best chlorine tablet ever made. Customers also say it makes maintenance so easy and minimal.

"...Robelle 1440M-K 5-in-1 3-Inch Multi-Purpose Tabs it is the easiest and best chlorine we have used...." Read more

"This peoduct is easy to use, just drop in skimmer and done!" Read more

"...These make Maintenance so easy and minimal. Will be ordering to start up pool next year." Read more

"Great value for the money. Ease of use." Read more

10 customers mention10 positive0 negative

Customers are satisfied with the chlorine in the pool spa water treatment. They mention that it is excellent, very effective, and perfect for keeping their chemicals perfect. It replaces both chlorine and algaecide, which helps offset the high price. Some say that the added benefit of added pool chemicals is a plus.

"Reasonable pricing. The added benefit of added pool chemicals is a plus. Tab does dissolve quicker than chorine only tabs...." Read more

"...n’t replace the need for actual chlorine but they do prolong the amount of time the chlorine you do put lasts." Read more

"Best chlorine but price is getting out of control on all chlorine" Read more

"...My chlorine levels are perfect. I will be buying these from now on." Read more

7 customers mention7 positive0 negative

Customers like that the auto balance keeps their pool very well balanced. They say it keeps the water clean and balanced automatically.

"...I must say that the pool has stayed PERFECT so far and we have switched over to the new filters. The water is clear and there are no algae blooms...." Read more

"...Long-lasting, and the pool maintains perfect balancek, greatly reducing the need for other chemicals,such as algaecide and chlorine "shock"..." Read more

"It keeps my pool very well balanced in quimicals they don't disintegrate easily..." Read more

"These tablets are THE BEST, not only does my pool stay perfectly balanced but these tablets last longer, dissolve slower than any other tablets I..." Read more

59 customers mention41 positive18 negative

Customers are mixed about the quality of the pool spa water treatment. Some mention that it has been stable and has solved their algae problem. Others say that the pucks arrived spilled out in box and some were broken.

"...The water is clear and there are no algae blooms. This is a far cry from last year. The chemical levels are right on...." Read more

"We've been using this 1 brand for about 2-3 years now. It contains everything the pool needs. THE WATER NEVER EVER TURNS GREEN\YELLOW!!!..." Read more

"...The bucket was open and the tablets were spilled out in box and some were broken but I used them anyway in my floater ...." Read more

"I liked the product it works well for my pool and keeps it clean" Read more

44 customers mention24 positive20 negative

Customers are mixed about the value of the pool spa water treatment. Some mention it's great value for the money, helps offset the high price, and is low cost magic chlorine hockey pucks. Others say it'll waste your money.

"...In our opinion, it is simply low cost magic chlorine hockey pucks! The more you buy the lower the cost! We go through about 40lbs per year" Read more

"...It also takes me less time to vacuum/maintain. These are more expensive tablets but well worth it. Highly recommend!!" Read more

"Reasonable pricing. The added benefit of added pool chemicals is a plus. Tab does dissolve quicker than chorine only tabs...." Read more

"...Fast shipping. The price is high currently on all chlorine tabs. I hope this new plant gets going soon." Read more

Reviews with images

See all photos

Sort reviews by

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Steve

Great Product! Crystal clear water!

Reviewed in the United States on August 22, 2021

Size: 35-PoundsStyle: Chlorine TabsVerified Purchase

This is a game changer for Pool Maintenance. I have been using these 5-in-1 3" tablets for 3 years. I have a 25,000 gallon inground pool and I use 3 tablets per week. The 5-in-1 tablet is amazing. I used to buy another brand of 3" tablets and also purchased shock, clarifier and algaecide that I needed to use every week. Since moving over to the Robelles 5-in-1 tablet, I no longer have to purchase the shock, clarifier or algaecide and my pool is crystal clear. It also takes me less time to vacuum/maintain. These are more expensive tablets but well worth it. Highly recommend!!

3 people found this helpful

Helpful

Red

Excellent product

Reviewed in the United States on September 20, 2021

Size: 35-PoundsStyle: Chlorine TabsVerified Purchase

Not usually a big review person but I felt compelled to write one for this product. Usually, I buy whatever I can get for the cheapest price possible but this year when supplies were short I grabbed a bucket of these to make sure I had some chlorine stocked up for the summer months. It turned out to be one of the best purchases I have ever made. I put these babies in my chlorinator and I barely have to do anything else to take care of the pool. Even if I forget to fill up the chlorinator for a couple of days the water stays perfect. I used to dread taking care of the pool so much that I was considering hiring a pool guy. Now I can take care of it with minimal work. These tablets are a game-changer. I highly recommend this product.

2 people found this helpful

Helpful

Lonnie Beckwith

Product arrived damaged from shipping, customer service resolved the issue.

Reviewed in the United States on April 2, 2024

Size: 35-PoundsStyle: Chlorine TabsVerified Purchase

I have been using this product for 5+ years and it works great, rarely do I need to add any other chemicals to control my pool.

Helpful

Lauren

Keeps water clear but at the expense of introducing copper

Reviewed in the United States on April 28, 2016

Size: 35-PoundsStyle: Chlorine TabsVerified Purchase

**Mid-Summer Update**

Okay I wanted to drop back in and update my review because my exuberance over this product has been beaten into submission. Although the product has done a fantastic job of keeping our pool water clear, it has also filled our pool with an outrageous amount of copper. We've tested off the charts and this chlorine is the only variable that has changed. What has happened since then is multiple partial drains, several treatments of metal out and we still have too much copper and a heck of a time getting the water balanced. So, in conclusion, I won't be buying this product anymore and will be redoubling my efforts to learn to do pool balancing the right way. I know someday I will get this right, but these 5-in-1 tabs, for us, just caused more headache. So if you DO decide to use this product, keep a close eye on your measurements, especially copper.

**First Review Below**

I'm not typically amazed by products, but this one has my attention. We've owned a house with a pool for 3 years now. The first year, we were learning and did okay keeping the pool clean. The second year we struggled and fought algae and cloudiness all year. I don't have a dollar figure, but we dumped a bunch of $$ in chemicals in the pool and only towards the end of the season really felt like it was in good shape.
Over the winter I started planning a new routine. I tried several local chlorine tabs and shock and none of them were outstanding and all were expensive. So this winter I stocked up with new products - I bought 4 new filters, a Doheneys pool starting kit, a nice pool brush and the largest container of Robelle 5-in-1 they sold. We started out with the old filters in and the starting kit and got most of the funk out of the pool. We used the shock and the algaecide from the opening kit and got it fairly clear. After reading reviews, I decided to put a mix of tabs in the chlorinator. I'm putting 10 per week right now, 1/2 5-in-1 and 1/2 regular tri-chlor tabs. I must say that the pool has stayed PERFECT so far and we have switched over to the new filters. The water is clear and there are no algae blooms. This is a far cry from last year. The chemical levels are right on. I imagine as spring turns into summer, I might have to change the number of tabs per week or the percentage of each type of tab, but for now I am impressed and will be buying another tub to make sure I don't run out.
If you've struggled with pool maintenance, give these tabs a shot and couple them with a regular maintenance routine.

6 people found this helpful

Helpful

johnj_01201

THE BEST - SIMPLEST - CHLORINE TABLET EVER MADE!

Reviewed in the United States on June 10, 2020

Size: 20-PoundsStyle: Chlorine TabsVerified Purchase

We've been using this 1 brand for about 2-3 years now. It contains everything the pool needs. THE WATER NEVER EVER TURNS GREEN\YELLOW!!! It is always crystal clear, even when we open it in the spring and it is full of leaves\debris. We have not added ANYTHING else and stopped testing the pool water a full year ago.

We have a 15,000 gallon pool 18' x 33' above ground. We keep 3-5 tablets in the 1 floater whenever the water is not frozen. All other brands, we had to use 2-3 chlorine floaters and always had to add PH +/- and all the other expensive chemicals. The pool water does not smell like any chemicals either!

In our opinion, it is simply low cost magic chlorine hockey pucks! The more you buy the lower the cost! We go through about 40lbs per year

One person found this helpful

Helpful

pattie

Chlorine tabs

Reviewed in the United States on July 19, 2023

Size: 5-PoundsStyle: Chlorine TabsVerified Purchase

I liked the product it works well for my pool and keeps it clean

Helpful

Raven Fieri, DVM

Dissolves too fast

Reviewed in the United States on June 26, 2023

Size: 10-PoundsStyle: Chlorine TabsVerified Purchase

Compared to the ones I usually buy, these tabs dissolve much faster than the denser chlorine tablets that have lasted me 3 years in the pat. For this reason I will not purchase this brand again or recommend these to anyone. They simply don’t last because of the inferior density.

2 people found this helpful

Helpful

Sam

Pool dream tablet

Reviewed in the United States on June 21, 2022

Size: 10-PoundsStyle: Chlorine TabsVerified Purchase

These tablets are all you need. I don’t do anything else to my pool, I don’t vacuum. This pool is in central Florida in late June. I even stopped buying that liquid gold from local pool store because I find it no longer needed. My pool is very clean and clear just by using these tables. I traveled for 35 days from late April to end of May 2022, placed 4 tables in the feeder before I left, decreased the flow to medium and returned to find my pool clean as in pics. Last year I relied on the liquid gold by doubling the amount before my 2 weeks travel and returned to a green/ brown cloudy pool. Those tablets are amazing.

5 people found this helpful

Helpful

Choose how often it's delivered

Skip or cancel any time

Image Unavailable

Robelle 1420M Chlorine Tabs Pool Sanitizer, 20-Pounds

Purchase options and add-ons

About this item

Customer ratings by feature

Frequently bought together

Top rated similar items

From the brand

Robelle Pool Chemicals

Step 1: Balance

Step 2: Sanitize

Step 3: Shock

Step 4: Algae Control

Further Maintenance

Videos for this product

Robelle Chlorine Tablets 3 Inch

Videos for this product

Customer Review: All around great product

Product information

Warranty & Support

Feedback

Looking for specific info?

Product guides and documents

Product Description

Compare with similar items

Customer reviews

Customers say

Reviews with images

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Amazon Prime includes:

Unlock 5% savings

Choose how often it's delivered

Skip or cancel any time

Unlock 5% savings

Choose how often it's delivered

Skip or cancel any time

Added to cart

Robelle 1420M Chlorine Tabs Pool Sanitizer, 20-Pounds

Purchase options and add-ons

About this item

Customer ratings by feature

Frequently bought together

Top rated similar items

From the brand

Robelle Pool Chemicals

Step 1: Balance

Step 2: Sanitize

Step 3: Shock

Step 4: Algae Control

Further Maintenance

Videos

Videos for this product

Robelle Chlorine Tablets 3 Inch

Videos for this product

Customer Review: All around great product

Product information

Warranty & Support

Feedback

Where did you see a lower price?

Looking for specific info?

Product guides and documents

Product Description

Compare with similar items

Customer reviews

Customers say

Reviews with images

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.