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15% off spa parts, filters, chemicals and accessories 15% off spa parts, chemicals and accessories Use code BF26 Free delivery plus a free icePOD with the Harmony hot tub Free delivery + free icePOD with the Harmony Shop Harmony Save £1,199 on the Active swim spa and heat pump bundle, plus a free icePOD Save £1,199 on the Active bundle, plus a free icePOD Shop Active Free gifts worth up to £2,199 with selected hot tubs and swim spas Free gifts worth up to £2,199 with selected hot tubs and swim spas See all offers Free 7kW heat pump worth £1,699 with every 2026 Jacuzzi hot tub Free heat pump with a 2026 Jacuzzi hot tub Shop Jacuzzi Free delivery on orders over £50 (chemicals, parts and hot tub accessories only) Free delivery over £50 on chemicals, parts and accessories
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Clearance
Free delivery on orders over £50 (Chemicals, Parts and Hot Tub Accessories ONLY)
  • Jacuzzi® Hot Tub Chlorine Granules
Black Friday 15% off with code BF26

Jacuzzi® Hot Tub Chlorine Granules - 1 kg

Model: CLGRAN1JOL

Regular price £9.99

Unit price

Ways to pay

Jacuzzi® Hot Tub Chlorine Granules - 1 kg, £9.99

0% finance on Jacuzzi is available by phone only. Call our team on 01482 212322 to talk it through.

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In stock Order by 2pm, Monday to Friday, for same-day dispatch

£2.99 standard deliveryFree over £50

Spend £50 for free standard delivery.

On parts, filters, chemicals and accessories

Features we love
  • Top grade chlorine granules for hot tubs, spas and more
  • Keeps your spa in the best condition all year round
  • Can used daily to keep water crystal clear and clean or as a shock dose
  • Super easy to use as they dissolve rapidly and evenly
  • Kills unwanted bacteria and controls algae
  • Jacuzzi® premium quality you can trust
All about me

Jacuzzi Hot Tub Chlorine Granules are a powerful sanitiser that disinfects hot tubs. This is top grade chlorine, suitable for spas or pools. Tested and recommended by Jacuzzi® to ensure you get a quality product at the best possible price. The most well known and cheapest way to sanitise your hot tub.

If you're looking to quickly and easily sanitise your hot tub water, chlorine granules are a great option. Chlorine granules dissolve quickly and are relatively pH neutral, making them perfect for shock-dosing your hot tub when you first set it up or if it hasn't been used in a while. Not only that, granules are also effective at raising chlorine levels in your hot tub water faster than tablets. Experience the Jacuzzi® difference for yourself.

How to use

Aim to maintain a chlorine level of 3 to 5mg/l at all times. How frequently you add more chlorine will depend on your usage and bathing habits. It could be daily, every two to three days or weekly. For 1mg/l, add 2g per 1000 litres.

Top tip: 10ml = approximately 10g

*We advise to use test strips to test sanitiser levels, pH levels and Total Alkalinity (TA).

FAQs

What is chlorine?

When you dissolve hot tub chlorine in water, it creates hypochlorous acid. This acid destroys waterborne bacteria on contact but deactivates over time. For this reason, you must regularly monitor your hot tub's chemical levels.

Still undecided on what sanitiser is right for your hot tub? Take a look at our chemical guide for more information.

For more advice on maintaining your tub using our chlorine granules, discover our handy chlorine maintenance guide here.

Trusted Protection

Crystal Clear Water with
Fast-Acting Chlorine

Chlorine is the industry standard for a reason. Highly effective and remarkably fast, it provides powerful, reliable sanitisation for both hot tubs and swim spas. It swiftly neutralises impurities on contact, ensuring your water remains pristine, safe, and always ready for your next soak.

Rapid Action

Goes to work immediately upon application to swiftly purify and protect your spa water.

Proven Reliability

The trusted, time-tested choice for consistent, powerful sanitisation in demanding aquatic environments.

Exceptional Clarity

Actively breaks down contaminants to maintain a sparkling, translucent finish, ensuring your hot tub or swim spa always looks pristine and inviting.

Technical Details

Complete specifications for your water care

Chemical Type
Chlorine
Pack Size
1 kg
Dosage
For 1mg/l, add 2g per 1000 litres.

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