Best Granule Swimming Pool Chlorine of 2026

Toby Butcher Avatar
Toby Butcher
Last Updated: 5 Feb 2026

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Granule swimming pool chlorine is a type of chemical compound that is commonly used to disinfect and sanitize swimming pools. It is a white, powdery substance that dissolves quickly in water and releases chlorine to kill bacteria and other harmful organisms. Granule chlorine is a popular choice among pool owners because it is easy to use, cost-effective, and can be added directly to the pool water without the need for special equipment. It is also effective in maintaining the pH levels of the pool and preventing the growth of algae. Overall, granule swimming pool chlorine is a reliable and efficient way to keep your pool clean and safe for swimming.

At a Glance: Our Top Picks

Bluewater 5kg Chlorine Granules for Pools Cover #TOP 1
Bluewater 5kg Chlorine Granules for Pools
ftb score rating icon 9.8
Clearwater CH0004 Chlorine Granules for Pools Cover #TOP 2
Clearwater CH0004 Chlorine Granules for Pools
ftb score rating icon 9.7
JOVS Chlorine Granules for Pools and Spas Cover #TOP 3
JOVS Chlorine Granules for Pools and Spas
ftb score rating icon 9.5

Top 10 Granule Swimming Pool Chlorine

#TOP 1

Bluewater 5kg Chlorine Granules for Pools

Bluewater 5kg Chlorine Granules for Pools Cover
Bluewater Chlorine Granules 5kg - Swimming Pool & Spa

The Bluewater Chlorine Granules are essential for maintaining your swimming pool or spa. These stabilised granules effectively kill waterborne bacteria, ensuring a safe and clean environment for you and your family. Their fast-dissolving formula means you can quickly treat your water, allowing you to enjoy your pool without delay. Additionally, these granules help prevent the loss of chlorine to sunlight, which means your pool remains sanitised for longer, giving you peace of mind and reducing the need for frequent reapplication.

What We Like
High-quality chemical formula
Kills bacteria effectively
Fast-dissolving for convenience
Prevents chlorine loss

Clearwater CH0004 Chlorine Granules for Pools

CH0004
White
5 kg
Clearwater CH0004 Chlorine Granules for Pools Cover
Clearwater Chlorine Granules for Hot Tub Spa and Swimming Pool Water Treatment for Rapid Disinfecting and Cleaning, Jerry Can, 5 kg

Clearwater Chlorine Granules are designed for rapid disinfecting of your hot tub or swimming pool water. These stabilised granules release free active chlorine, ensuring a hygienic swimming environment by killing bacteria and harmful organisms. Unlike traditional tablets, these fast-dissolving granules start working instantly, saving you time and effort. They also help stabilise chlorine levels, keeping your pool's chlorine between 1-3 mg/litre and hot tub's chlorine between 3-5 mg/litre, ensuring optimal water quality for your enjoyment.

What We Like
Fast dissolving for quick use
Effective against bacteria
Maintains stable chlorine levels
Easy-to-follow instructions included
BISHTA approved for reliability
#TOP 3

JOVS Chlorine Granules for Pools and Spas

05-cg
JOVS Chlorine Granules for Pools and Spas Cover
JOVS Chlorine Granules 5kg : Stabilized Chemicals for Hot Tubs, Pools, and Spa's - Swimming Cleverness for Rapid Disinfecting and Cleaning, Spa Water Treatment.

The JOVS Chlorine Granules provide effective disinfection for hot tubs, pools, and paddling pools, ensuring a clean and hygienic space for your water activities. With a stabilized chemical formula, these granules maintain optimal chlorine levels, giving you peace of mind. You can enhance bather comfort by easily adjusting pH levels to the recommended range. For new pools or spas, the startup dose recommendation allows you to establish the right chlorine residual quickly, making your setup hassle-free.

What We Like
Rapid disinfecting capabilities
Stabilized chemical formula
Easy pH balance adjustment
Customizable dosing options
#TOP 4

SHATCHI 1 Kg Chlorine Granules for Pools

BLUE SPARKLE
White
SHATCHI 1 Kg Chlorine Granules for Pools Cover
1 Kg Stabilised Chlorine Granules for Hot Tubs, Spas, Swimming Pools, Fast Dissolving for Rapid Water Disinfecting, Cleaning and Pool Water Treatment

SHATCHI Chlorine Granules offer an effective solution for disinfecting your pool or spa water. With stabilised granules, you can quickly maintain a healthy swimming environment by ensuring free active chlorine levels are adequate. The fast-dissolving nature of these granules means you won't have to wait long for treatment, allowing you to enjoy your pool or spa sooner. Additionally, the product includes helpful guidelines for dosing, making it easy for you to achieve the ideal chlorine levels for both pools and hot tubs.

What We Like
Effective water disinfection
Fast-dissolving for quick use
Easy dosing instructions included
Maintains healthy swimming environment
Suitable for all pools and spas

SUDS-ONLINE Stabilised Chlorine Granules for Pools

SUDS-ONLINE Stabilised Chlorine Granules for Pools Cover
SUDS-ONLINE 500G Stabalised Chlorine Granules - Swimming Pool Chemicals & Spa

The SUDS-ONLINE Chlorine Granules are specially formulated with a stabilising agent to protect against the damaging effects of sunlight and UV rays. This means you can enjoy a longer-lasting sanitiser for your swimming pool, spa, or hot tub. For swimming pools, maintaining the right chlorine levels is easy, with guidance provided for both small and heavily used pools. In spas, just a small amount can significantly boost your free chlorine levels, ensuring a safe and pleasant bathing experience for all users.

What We Like
Stabilises chlorine against UV rays
Easy to use for pools
Effective for spas and hot tubs
Maintains safe chlorine levels
#TOP 6

ClearSpa Chlorine Granules for Hot Tubs and Pools

ClearSpa
ClearSpa Chlorine Granules for Hot Tubs and Pools Cover
ClearSpa Chlorine Granules 5kg - Stabilized Suitable for Hot Tub, Spa and Swimming Pool Treatment

ClearSpa Chlorine Granules are designed for easy and effective disinfection of your spa, hot tub, or swimming pool water. The rapid-dissolving formula ensures that you can quickly maintain clean and safe water without affecting the pH balance significantly. You can conveniently add these granules directly into the water while the circulation is running, as long as the water temperature is above 20°C. This makes daily disinfection hassle-free, allowing you to enjoy your water features without worry.

What We Like
Rapid dissolving for quick use
Minimal impact on pH levels
Direct addition during circulation
Ideal for daily disinfection
#TOP 7

Bluewater 5kg Shock Chlorine Granules for Pools and Spas

Bluewater 5kg Shock Chlorine Granules for Pools and Spas Cover
Bluewater 5kg Shock Chlorine Granules Swimming Pool & Spa

The Bluewater Shock Chlorine Granules provide a high strength formula with 65% available chlorine, allowing you to quickly and effectively treat your swimming pool or spa. The fully soluble granules dissolve completely, leaving no residue and ensuring even distribution for your convenience. This product powerfully eliminates bacteria, algae, and organic contaminants, helping to keep your water safe and crystal clear. Additionally, its close-to-neutral pH balance minimises disruption to your water chemistry, so you can easily maintain ideal conditions with less hassle.

What We Like
High chlorine concentration
Completely soluble granules
Effective bacteria elimination
Neutral pH balance
Suitable for regular use
#TOP 8

SUDS-ONLINE 5KG Stabilised Chlorine Granules for Pools

SUDS-ONLINE 5KG Stabilised Chlorine Granules for Pools Cover
SUDS-ONLINE 5KG Stabalised Chlorine Granules - Swimming Pool Chemicals & Spa

The SUDS-ONLINE Chlorine Granules are specially formulated with a stabilising agent, making them perfect for maintaining safe bathing conditions in both pools and spas. This feature helps protect the granules from the harmful effects of sunlight and UV rays, ensuring they remain effective for longer. For pool owners, using these granules enables you to achieve the ideal chlorine levels efficiently, while spa users can easily adjust their chlorine levels with just a teaspoon per person. Enjoy a cleaner and safer bathing experience with these reliable granules.

What We Like
Stabilised for longer effectiveness
Easy chlorine level adjustments
Suitable for indoor and outdoor use
Maintains safe bathing environment
#TOP 9

Relax 5kg Shock Chlorine for Pools

Relax
RCH022
Relax 5kg Shock Chlorine for Pools Cover
Relax 5kg Shock Chlorine Granules Swimming Pool Chemicals

The Relax Shock Chlorine is designed to tackle cloudy or green water in your swimming pool effectively. With precisely graduated shock chlorine, you can accurately treat your pool to restore its clarity. Typically, you should add 500 g for every 10,000 gallons of water, making it easy to maintain the right balance. Importantly, remember never to mix pool chemicals together, ensuring safety and optimal performance. This product simplifies pool maintenance, allowing you to enjoy a clean and inviting swimming environment.

What We Like
Effectively clears cloudy water
Easy dosage instructions
Safe to use
Quickly restores pool clarity
#TOP 10

Bluewater Stabilised Chlorine Granules 5kg for Pools

Bluewater Stabilised Chlorine Granules 5kg for Pools Cover
Bluewater Stabilised Chlorine Granules 5kg - For Swimming Pool, Spa & Hot Tub

The Bluewater Chlorine Granules offer genuine Bluewater Pool & Spa Chemicals, ensuring you receive high-quality disinfection products for your swimming pool, spa, or hot tub. Using this product helps maintain clean and safe water by effectively killing bacteria and algae. As the UK's favourite chemical retailer, PoolShopUK provides a reliable source for these trusted chemicals. This means you can enjoy peace of mind knowing your pool or spa water is properly treated with top-quality chlorine granules designed for your convenience and health.

What We Like
Genuine Bluewater quality
Effective disinfection
Suitable for pools and spas
Trusted UK retailer
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Can you swim with chlorine granules?

The Advantage of Chlorine Granules for Swimming Pools Because they dissolve quicker, they can get to work against algae and bacteria faster. It's this advantage that makes granules a go-to for shock treatments, for example. The downside of granules and their fast-acting nature is how frequently it needs to be used.

2. What is granular pool chlorine?

Granular chlorine, also known as calcium hypochlorite, is a type of dry chlorine primarily used to clean swimming pools. It is one of two forms of solid chlorine, with the other form of solid chlorine being chlorine tablets.

3. How soon after chlorine granules can you swim?

It is safe to swim once your chlorine levels are around 5 ppm or after 24 hours. It is always best to test first! Muriatic acid can create a hot spot of acid in the water that could potentially burn or irritate your skin. It is best to wait 30 minutes after adding it to your pool.

4. Is liquid chlorine or granules better?

Liquid chlorine may be a good choice if you have a large pool, but the costs associated with it, and the available chlorine per pound could mean that chlorine granules are the better option. In the end, both liquid chlorine and chlorine granules will do their job and keep your pool clean and clear.

Editor's Notes

During our granule swimming pool chlorine research, we found 133 granule swimming pool chlorine products and shortlisted 10 quality products. We collected and analyzed 71,738 customer reviews through our big data system to write the granule swimming pool chlorine list. We found that most customers choose granule swimming pool chlorine with an average price of £22.65.

The granule swimming pool chlorine are available for purchase. We have researched hundreds of brands and picked the top brands of granule swimming pool chlorine, including bluewater POOL & SPA CHEMICALS, Clearwater, JOVS, SHATCHI, SUDS-ONLINE.

Written by
Toby Butcher Avatar

Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.