Best Granule Pool Chlorine of 2025

Bryan Hicks
Last Updated: Jan 3, 2025

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Granule pool chlorine is a highly effective and versatile pool cleaning product that is essential for maintaining a safe and hygienic swimming environment. This product comes in the form of small granules that dissolve easily in water to release powerful cleaning agents that eliminate harmful bacteria, algae, and other contaminants. Granule pool chlorine is ideal for use in both residential and commercial pools, and it can be added directly to the water without the need for complicated mixing or measuring. With its fast-acting formula and long-lasting results, granule pool chlorine is a must-have for any pool owner looking to keep their pool clean and healthy.

At a Glance: Our Top Picks

#TOP 1
Clorox Pool&Spa XtraBlue Chlorinating Granules
ftb score rating icon9.8
#TOP 2
In The Swim Sodium Dichlor Shock Granules
ftb score rating icon9.7
#TOP 3
Pool Mate Concentrated Chlorinating Granules
ftb score rating icon9.5

Top 9 Granule Pool Chlorine

#TOP 1

Clorox Pool&Spa XtraBlue Chlorinating Granules

CLOROX POOL & Spa
24106CLX
Blue
6 Pounds
CLOROX Pool&Spa All-in-One XtraBlue Chlorinating Granules, Kills Bacteria & Stops Algae, Blue, 6 Pounds
ftb score rating icon9.8
FTB Score

Clorox XtraBlue Chlorinating Granules is a pool chlorine product that offers dual-action sanitizer and shock to help you keep your pool clean and healthy. It kills bacteria and prevents all types of pool algae, ensuring that your pool water is always crystal clear. The product also improves filter performance, which makes cleaning your pool easier and more efficient. With Clorox XtraBlue Chlorinating Granules, you can enjoy your pool without worrying about harmful bacteria or algae growth.

What We Like
Effective results
Easy to use
Long-lasting
#TOP 2

In The Swim Sodium Dichlor Shock Granules

C4025
multi-colored
25 Pound
In The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast Dissolving, pH Balanced Sanitizer - 56% Available Chlorine, 99% Sodium-Dichlor – 25 Pound
ftb score rating icon9.7
FTB Score

In The Swim Chlorine Granules are designed for effective sanitization of swimming pools, spas, and fountains. This powerful powder eliminates bacteria and contaminants, ensuring your water remains clean and safe. With a calcium-free formula, it helps maintain clarity in hard-water pools, preventing any cloudiness. The granules contain a high concentration of stabilized chlorine, making them a reliable choice for quick disinfection. You can count on these fast-dissolving granules to keep your water sparkling, providing you with peace of mind during your swim.

What We Like
Effective bacteria elimination
Calcium-free for clarity
Fast-dissolving for convenience
High concentration of chlorine

Pool Mate Concentrated Chlorinating Granules

1-1308
8-Pounds
Pool Mate 1-1308 Pool Chlorine Granules, 8-Pounds
ftb score rating icon9.5
FTB Score

Pool Mate Concentrated Chlorinating Granules are the perfect solution for keeping your pool free of algae. The product is super-concentrated, residue-free, and fast-dissolving. It is effective and easy to use, making it a favorite among customers. The granules can be used as a routine chlorine sanitizer or as a shock treatment, and it has little to no effect on pH levels. Simply broadcast 3 oz. of this product per 10,000 gallons pool water every other day or as often as needed to maintain chlorine residual at 2-4 ppm. It is calcium-free, so there's no need to worry about clouding, and it can be used in spas, hot tubs, and swimming pools.

What We Like
Super-concentrated, residue-free, and fast-dissolving
Effective and easy to use
Can be used as a routine chlorine sanitizer or as a shock treatment
Little to no effect on pH levels
Calcium-free, can be used in spas, hot tubs, and swimming pools
#TOP 4

AQUA-ORG PLUS - Calcium Hypochlorite Pool Shock (55 lb)

AQUA-ORG PLUS
White
50 Pound Pail
Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 55 Pound Pail
ftb score rating icon9.3
FTB Score

Keep your swimming pool, spa, and hot tub clean with AQUA-ORG PLUS Calcium Hypochlorite granules. With 65% concentration, these granules are perfect for immediate and dramatic results in cleaning and clearing cloudy water. The product is US EPA registered and approved biocide, making it safe for use. Use it to get rid of algae, bacteria, and other contaminants in your pool.

What We Like
Immediate and dramatic results in cleaning and clearing cloudy water.
US EPA registered and approved biocide.
Safe for use in swimming pools, spas, and hot tubs.
#TOP 5

Pool Shark 68% Calcium Hypochlorite Shock

POOL SHARK
CH50
Bucket
50 Pound
68% Calcium Hypochlorite Pool Shock for Swimming Pools - Chlorine Granules Swimming Pool Shock 50 lbs Bucket - Pool Chlorine for Inground and Above Ground Pool Treatment, Saltwater (50lbs)
ftb score rating icon9.2
FTB Score

Pool Shark Chlorine Shock is an effective solution for quickly rejuvenating your swimming pool after heavy use. With fast-dissolving granules, you can easily add the right amount to your pool and see results in just 24 to 48 hours. This powerful formula eliminates harmful bacteria, fungi, and algae, ensuring that your pool water is not only clear but also safe for swimming. It’s versatile, suitable for various pool types, including inground, above ground, and saltwater pools. Plus, you can measure precisely according to your pool size, making it simple to maintain optimal water quality.

What We Like
Quick shock treatment
Effective against bacteria
Compatible with all pool types
Exact dosage for any size
#TOP 6

In The Swim Calcium Hypochlorite Chlorine Granular Pool Shock - 12 X 1 Pound Bags

25235 12X1
Multicolor
12 x 1 Pound
In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 12 X 1 Pound
ftb score rating icon9.1
FTB Score

In The Swim Pool Shock is a powerful chlorine shock treatment that helps you maintain the cleanliness of your pool. With its main active ingredient, Calcium Hypochlorite (Cal-Hypo), it quickly eliminates harmful contaminants such as algae and bacteria from your pool water. Its dosage of 1 pound per 10,000 gallons is easy to measure and apply. This shock treatment is versatile and can be used in swimming pools, spas, and hot tubs. However, it's important to pre-dissolve or dilute the Cal-Chlor granules to prevent bleaching of the liner. With In The Swim Pool Shock, you can keep your pool water sanitized and crystal clear with ease.

What We Like
Quickly eliminates contaminants
Easy to measure and apply
Versatile for use in pools, spas, and hot tubs
#TOP 7

Zappit 73 Dry Chlorine Granules

ZAPPIT
W8000562
Zappit 73 Dry Chlorinating Granules for Swimming Pools (50 lb)
ftb score rating icon9.1
FTB Score

Zappit Dry Chlorine offers an effective solution for maintaining your swimming pool. As a powerful pool shock and super chlorinator, it quickly eliminates contaminants, ensuring your water stays clean and safe. The fast-dissolving granules make it easy to use, allowing you to treat your pool without hassle. With 73% Calcium Hypochlorite, this product not only sanitizes but also helps prevent future algae growth, keeping your pool clear and inviting. Additionally, being non-stabilized means it works efficiently without adding unwanted chemicals, giving you peace of mind while you enjoy your swimming experience.

What We Like
Effective pool shock
Fast-dissolving formula
Prevents algae growth
Non-stabilized chlorine

Leisure Time 22337A Spa 56 Chlorinating Granules

22337A
Gray
1-Pack
LEISURE TIME 22337A Spa 56 Chlorinating Granules for Hot Tubs, 2 lbs, gray
ftb score rating icon9.0
FTB Score

Leisure Time 22337A Spa 56 Chlorinating Granules is specifically formulated for spa and hot tubs. It quickly dissolves and helps control algae growth while destroying organic contaminants to maintain clean, clear, sanitized water. It is EPA approved and has a pH neutral formula.

What We Like
Specifically formulated for spa and hot tubs
Quickly dissolves
Helps control algae growth
Destroys organic contaminants
EPA approved and pH neutral formula
#TOP 9

Doheny's Di-Chlor Pool Chlorine Granules

6210
10 lb.
Doheny's Di-Chlor Granular Chlorine | Pro-Grade 3-in-1 Pool Chlorine Granules Sanitizer, Shock and Algaecide! | Fast-Dissolving | Highly-Concentrated 56% Available Stabilized Chlorine | 10 LB Bucket
ftb score rating icon9.0
FTB Score

Doheny's Di-Chlor Granules are a versatile solution for pool maintenance, combining sanitization, shock treatment, and algae elimination in one product. This fast-dissolving formula ensures that your water stays crystal clear without leaving any residue. By using just 1 lb of granules per 10,000 gallons of water, you can easily maintain proper chlorine levels, making pool care straightforward. With a high concentration of 56% stabilized chlorine, you can trust that your pool will remain clean and safe for swimming, giving you peace of mind during your leisure time.

What We Like
Multi-purpose functionality
Fast-dissolving formula
No residue left behind
Easy dosage instructions
Buying Guide Image

What to Look for in Granule Pool Chlorine

As a pool owner, you want to keep your water crystal clear and free of bacteria and algae. Chlorine is a crucial element in maintaining clean and healthy pool water, but not all chlorine is created equal. When it comes to choosing the right granules for your swimming pool, there are a few key factors to consider.

First and foremost, it’s important to select a high-quality brand that is trusted and proven effective. Look for chlorine granules that are specifically designed for swimming pool use and have been proven to effectively kill bacteria and algae. Avoid generic or off-brand options that may not be as effective or safe for your pool.

Next, consider the type of granules you want to use. There are two main options: stabilized and unstabilized. Stabilized granules have a protective coating that helps them last longer in the sun, which is especially important if you live in a sunny climate. Unstabilized granules are more affordable, but they may not last as long and may need to be added more frequently.

Another important factor to consider is the size of the granules. Large granules tend to dissolve slower, which can make them more effective in maintaining a consistent chlorine level in your pool. Smaller granules dissolve more quickly, but they may need to be added more frequently to maintain the same level of chlorine.

Finally, consider the price and value of the granules you’re considering. While it’s important to invest in high-quality granules, you also want to make sure you’re getting a good deal. Look for value packs or bulk options that can save you money in the long run.

In conclusion, choosing the right granules for your swimming pool chlorine is an important decision. Take the time to research and select a high-quality, trusted brand, consider the type and size of granules, and look for a good value to ensure your pool stays clean and healthy all season long.

Frequently Asked Questions (FAQs)

1. How much granular chlorine do I add to my pool?

For routine maintenance, add 3.5 g to 5 g of granular chlorine to your pool. The packaging of disinfecting products should provide instructions on the recommended amount of chlorine to use.

2. Is it better to use chlorine tablets or granules?

Chlorine tablets have the advantage of slowly dissolving over time, providing a continuous supply of chlorine to the water. Granules, on the other hand, need to be added manually, which increases the risk of chlorine levels dropping if not attended to. This can lead to bacterial growth. Therefore, chlorine tablets are often preferred for maintaining consistent chlorine levels.

3. How long after adding chlorine granules can you swim?

If you are only adding chlorine to your pool, it is recommended to wait a few hours (up to 4 hours) before swimming. However, if you are performing a shock treatment with chlorine, it is advised to wait a full 24 hours before swimming. Regularly checking the balance of your pool water will ensure you know when it is safe to swim.

4. How much chlorine granules to shock a 10000 gallon pool?

To shock a 10000 gallon pool, you should add one pound (or one gallon) of shock per week to two weeks. However, during hot weather or frequent use, you may need to shock more frequently to maintain proper chlorine levels.

5. How long do chlorine granules take to work?

Chlorine granules dissolve immediately upon being added to the water, providing an immediate boost of free chlorine. However, the chlorine levels will gradually decrease over time, and you will need to add more granules when the levels fall below 3mg/l (milligrams per liter). Regular monitoring and maintenance are necessary to ensure proper chlorine levels in your pool.

Editor's Notes

During our granule pool chlorine research, we found 24 granule pool chlorine products and shortlisted 9 quality products. We collected and analyzed 133,994 customer reviews through our big data system to write the granule pool chlorine list. We found that most customers choose granule pool chlorine with an average price of $125.61.

The granule pool chlorine are available for purchase. We have researched hundreds of brands and picked the top brands of granule pool chlorine, including CLOROX POOL & Spa, In The Swim, Pool Mate, AQUA-ORG PLUS, POOL SHARK. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by

Bryan Hicks is a professional gardener and a writer who lives in North Texas with his family and his dog. Bryan has spent more than half of his life surrounded by garden products. He has extensive experience in garden makeovers and maintenance and lawn care. His areas of expertise include outdoor decoration, gardening and garden design.