10 Best Hot Tub Water Treatment Products in The UK

Last updated on 06/07/2025

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JOVS Non Chlorine Shock 5kg - Spa Treatment for Hot Tubs & Swimming Pools - Water Clarifier, Paddling Reducer, Cleaner, and Pool Maintenance Essential - Included Pool Chemicals.

Why We Love It

Pure sanitization without chlorine.
Odorless comfort and ease.
Effortless application, instant dissolution.

Main Highlights

PURE SANITIZATION WITHOUT CHLORINE: Our Non-Chlorine Shock 5kg ensures pristine water in pools, hot tubs, and spas. Its potent, chlorine-free formula effectively eliminates contaminants and bacteria, delivering crystal-clear water without the need for chlorine.
ODORLESS COMFORT AND EASE: Bid farewell to strong chlorine odors. With our Non-Chlorine Shock 5kg, enjoy an odorless and non-irritating water treatment experience. Breathe easy and relish the pure, sanitized environment without compromise.
EFFORTLESS APPLICATION, INSTANT DISSOLUTION: Simplify water maintenance with quick and easy application instructions. The fast-dissolving formula of Non-Chlorine Shock 5kg ensures efficient distribution, saving you time and effort while maintaining a hygienic aquatic space.
VERSATILE COMPATIBILITY FOR ALL SYSTEMS: Tailored for universal compatibility, Non-Chlorine Shock 5kg seamlessly integrates with chlorine, bromine, and other sanitizing systems. Versatile and effective, it's the ideal choice for any water setup.
ENHANCED ENJOYMENT, MINIMIZED IRRITATIONS: Elevate your aquatic experience with Non- Chlorine Shock 5kg. Besides powerful sanitization, it reduces respiratory irritations, ensuring a safer and more enjoyable environment for all water enthusiasts.

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

31% Off

Why We Love It

Maintains a healthy environment.
Kills bacteria effectively.
Dissolves instantly for convenience.

Main Highlights

DISINFECT POOL AND HOT TUB WATER: with these stabilised chlorine granules - free active chlorine to maintain a healthy swimming environment
KILL BACTERIA AND ELIMINATE HARMFUL ORGANISMS: so your spa or pool water stays hygienic and healthy
FAST DISSOLVING GRANULES: get to work instantly - no more waiting around for hours for tablets to dissolve
STABILISE CHLORINE LEVELS: to help ensure your water chlorine level stays between 1-3 mg/litre (ppm) for pools and 3-5 mg/Litre (ppm) for hot tubs
EASY TO FOLLOW INSTRUCTIONS: included with the granules help you select the correct amount to apply for the desired increase in chlorine level

O-Care Spa Water Care Kit

Why We Love It

Natural and safe for everyone.
Gentle on skin, no odor.
Convenient weekly use, lasts long.

Main Highlights

Natural Whirlpool Water Care
Safe - Less chemicals required
Gentle - Makes your skin supple and odourless.
Easy - Use only once a week, lasts up to 5 months
Includes water care app

Clearwater Spa Chemical Starter Kit

19% Off

Why We Love It

Complete hot tub care solution.
Simple usage with provided guide.
Ensures hygienic, pristine water.

Main Highlights

AWARD WINNING STARTER SET: includes everything you need to get started with your Lay-Z-Spa or any other hot tub for hygienic and pristine water
INCLUDES: 500g chlorine, 700 g pH minus 500 g pH plus, 500 ml foam remover, 25 test strips and a dosing guide
EASY TO USE: with simple, easy-to-follow instructions provided in the kit
DISINFECT YOUR HOT TUB: with the fast-acting chlorine granules to keep the water free from bacteria
CONTROL THE PH LEVELS: with the pH PLUS, pH MINUS and Dip Test Strips so you ensure the water is comfortable on your skin
BISHTA APPROVED MEMBER: Clearwater is a BISHTA approved member and recommended by brands such as Bestway and Lay-Z-Spa for reliable, safe and high-quality water treatment
BISHTA APPROVED CHEMICALS: Clearwater is BISHTA approved and recommended by brands such as Bestway and Lay-Z-Spa for reliable, safe and high-quality water treatment

JOVS Non-Chlorine Shock 1kg - Spa & Pool Treatment - Chlorine-Free Water Clarifier, Odorless & Irritation-Free, Compatible with Bromine & Chlorine Systems, Pool & Hot Tub Maintenance Essential.

Why We Love It

Odourless and non-irritating treatment.
Effortless and fast dissolution.
Compatible with all systems.

Main Highlights

Chlorine-Free Sanitization: Enjoy pristine, clear water in your pool, hot tub, or spa without the harshness of chlorine. JOVS Non-Chlorine Shock eliminates contaminants and bacteria while leaving water crystal-clear and fresh.
Odorless & Non-Irritating: Say goodbye to strong chlorine odors and skin irritation. This non-chlorine shock treatment offers an odorless and gentle swimming experience, ensuring comfort for all water enthusiasts.
Universal Compatibility: Works seamlessly with all pool and hot tub systems, including chlorine, bromine, and chemical-free systems.
Fast-Dissolving Formula: Simplify water maintenance with our quick-dissolving formula. Easily apply by dissolving the recommended amount in water and adding it directly to your pool or spa.
Reduced Respiratory Irritations: Enjoy a safer, more comfortable water treatment experience with reduced respiratory irritations and enhanced water quality.
Versatile & Effective: Ideal for regular pool and hot tub shock treatment, or when you need to restore water clarity after a high bather load or neglected pool.
Maintenance Made Easy: With regular use every 1-2 weeks, JOVS Non-Chlorine Shock keeps your aquatic space clean and ready for enjoyment.

SpaChem Spa Hot Tub System Flush 5ltr, Hot Tub Pipe Flush Cleaner - breaks down and removes biofilm build up, dirt, oils, unpleasant smells from your internal hot tub pipes.

Why We Love It

Breaks down harmful biofilms.
Cleans pipework and fittings.
Treats large volumes effectively.

Main Highlights

Spa & Hot Tub Flush should be used before the water is de-commissioned / drained down (typically no longer than 12 weeks for domestic spas and hot tubs) although heavy use will require more frequent drain downs.
This product is formulated to internally clean all the pipework and fittings and will also breakdown biofilms which can provide an ideal environment for harmful viruses and bacteria to live
t is recommended this process is carried out at least every 3 months
250ml will treat up to 1750ltrs of hot tub water
Remove all filters and erosion feeders prior to application of product and ensure filters are thoroughly cleaned before re-installation

Veddelholzer 180 Chlorine Mini Tabs. Fast dissolving chlorine tablets for hot tubs & swimming pool, children's pools & whirlpools. Pool Accessories Pool Cleaning & Disinfection hot tub chemicals

Why We Love It

Perfect for small pools.
Speedy algae prevention guaranteed.
Quick-dissolving and residue-free.

Main Highlights

✅SPECIAL FOR SMALL POOLS & HOT TUB: Chlorine tablets for hot tub. Specially developed for small pools, skimmer pools, paddling pools, whirlpools, hot tub and many more. The multifunctional mini chlorine tablets have a weight of 2.7 g each and are optimally designed for use in small pools.
✅EFFECTIVE AGAINST ALGAE: Crystal clear water even after a long time. The specially developed composition of our mini chlorine tabs disinfects and prevents algae growth at all times. Fungi, bacteria and other impurities don't stand a chance.
✅LESS AGGRESSIVE: Compared to slow-dissolving chlorine tablets, the fast-dissolving Veddelholzer Mini Tabs are less aggressive and therefore ideally suited for foam pads and inflatable pools. Ideal hot tub chemicals.
✅EASY TO USE: You will find a detailed description of the dosage on the packaging. No long measuring with dangerous chemicals. The simple dosage of the tablets saves a lot of time and nerves.
✅QUICKLY DISSOLVING: The Veddelholzer mini chlorine tablets for hot tubs increase the chlorine content quickly and effectively. The chlorine tablets dissolve completely without leaving any residue and are also suitable for chlorine shock application. Use biocidal products with caution. Always read the label and product information before use.

Pool Chemical Starter Kit for Hot Tubs, Above Ground Pool, Paddling Pool Water Treatment (Includes Chlorine Granules, pH Minus, pH Plus, Foam Remover, Test Strips, Measuring Spoons)

Free Shipping

Why We Love It

Complete starter kit provided.
Offers ease of usage.
Ensures hygienic, comfortable water.

Main Highlights

✅ 【Complete Pool Treatment Kit】 – ISO9001 certified spa chemical kit includes 500g chlorine granules, 500g pH plus, 700g pH minus, 500ml foam remover, 25 test strips & measuring spoons set – ideal for hot tubs & paddling pools.
✅ 【Perfect for Hot Tubs & Pools】 – Suitable for spas, inflatable hot tubs, above ground pools & paddling pools; keeps water clean & crystal clear. With simple, easy-to-follow instructions provided in the kit anyone can use it.
✅ 【500g Stabilised Chlorine Granules】 – Fast-dissolving chlorine for safe disinfection and bacteria control in your hot tub or swimming pool.
✅ 【pH Balancers (pH Minus, pH Plus)】 – Helps maintain balanced water pH to avoid irritation and enhance chlorine effectiveness.
✅ 【Test Strips & Foam Remover Included】 – 25 water testing strips for quick analysis & 500ml defoamer to reduce unwanted foam buildup commonly caused by substances such as oils, deodorants and shampoos.

Clearwater Fast-Dissolving Chlorine Tablets, 167 Tabs for Hot Tubs & Pools, Quick-Acting Water Treatment

21% Off

Why We Love It

Quick dissolving for immediate use.
Keeps water safe and clean.
Easy to follow instructions included.

Main Highlights

QUICK DISSOLVING CHLORINE TABLETS: Will fully dissolve and circulate within your pool/hot tub water within 30 minutes
KEEP YOUR POOL AND HOT TUB WATER SAFE: By using these tablets to disinfect and remove harmful bacteria from your water
EASY TO USE: As each tablet raises the chlorine level by 1.5 mg/l (ppm) per 1000 Litres; clear instructions are included on the tub
MINIMAL IMPACT ON PH: So you can use the tablets without worrying about any adverse effects on the water pH levels
BISHTA APPROVED MEMBER: Clearwater is a BISHTA approved member and recommended by brands such as Bestway and Lay-Z-Spa for reliable, safe and high-quality water treatment

Clearwater Foam Remover for Swimming Pool and Spa Treatment, 1 Litre

Free Shipping

Why We Love It

Clearwater removes persistent foam easily.
Promotes hygiene and pristine water.
Simple to follow instructions.

Main Highlights

Clearwater Foam Remover controls and prevents foaming in your above ground pool or spa
Foaming is very common in hot tubs from oils, deodorants, shampoos- use this to remove any foam regardless of the cause
Ensures that your spa or pool stays hygienic and looks pristine so you can relax and enjoy
Very simple to use and instructions are provided on the bottle- add directly to the spa or pool whilst the pump is turned on to aid distribution
Clearwater is a BISHTA approved member and recommended by brands such as Bestway and Lay-Z-Spa for reliable, safe and high-quality water treatment

9.0

Superb

We scanned 761 products

We reviewed these offers relevant to the Hot Tub Water Treatment Products within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like JOVS, Clearwater, O-Care, SpaChem, Veddelholzer, SHATCHI, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Hot Tub Water Treatment Products in the market, we considered we took a deep dive into 3806 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is JOVS Non Chlorine Shock 5kg - Spa Treatment for Hot Tubs & Swimming Pools - Water Clarifier, Paddling Reducer, Cleaner, and Pool Maintenance Essential - Included Pool Chemicals.. We love many things about this product by JOVS. What sets it apart from the competition is Pure sanitization without chlorine, Odorless comfort and ease, Effortless application, instant dissolution.
The best value product for most shoppers and where user satisfaction is continuously the highest is Clearwater Chlorine Granules for Hot Tub Spa and Swimming Pool Water Treatment for Rapid Disinfecting and Cleaning, Jerry Can, 5 kg by Clearwater based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Hot Tub Water Treatment Products and the best cost-to-value ratio is Clearwater Chlorine Granules for Hot Tub Spa and Swimming Pool Water Treatment for Rapid Disinfecting and Cleaning, Jerry Can, 5 kgat Clearwater with a 31% discount.
Our list of the best Hot Tub Water Treatment Products is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Hot Tub Water Treatment Products in The UK

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Relax 1kg Granular Shock Treatment Hot Tub Spa Swimming Pool Chlorine Oxidiser

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Clearwater Scale and Stain Controller Treatment for Filter Pumps, Hot Tubs, Spas and Pools, 1 Litre, White

We scanned 761 products

We concluded that: