Providing the best cleaning products for a better experience ORDER NOW Hot Tub Cleaning Essentials Free Delivery Free delivery for orders over £50 Shop Now Green/Sage Full VoileAromatherapy crystals now 33% off
Free Delivery
Get free delivery on all orders over £50 and our supply range covers you no matter where are you within the UK
Product Variation
We offer more than 30 products to make your hot tub experience a remarkable one
Service And Maintenance
From the moment of purchase, we are proud to commit exceptional post-sale service and maintenance

Featured Items For Your Hot Tub

$ 26.21

Hot Tub Sparkle Details

  • 1 Litre of High Quality
  • For adding lustre and clarity to spa water.
  • Hgihly effective water polisher.
  • Add directly to your hot tub water.
  • For a 1,000 litre tub, add 50ml initial dose and you can top up weekly with 25ml per week.
$ 31.49

  • Indulge yourself with Spazazz Mimosa Celebrate Mood Crystals, the enlivening aromatherapy blend of sensual scents with therapeutic benefits, and moisturizing botanicals. Spazazz aroma therapy crystals set the mood, arouse emotion, and relax your state of mind. Feel the calm and natural release of aches and pains. Free the spirit with passion, as tension and stress melt away.
    • Spa safe
    • No oily residue

Note:113g tubs

$ 49.03

Freshwater salt for use in salt dosing systems specifically designed for Caldera hot tubs using Freshwater salt and Hot spring using the Ace system.

Scoop included.

$ 17.34

This Genuine Caldera Spas 100 square foot filter is designed for use on all Caldera Utopia Series Spas except older Cantabria model hot tubs. This filter will also work with all Caldera Aquatic Melodies Series spas. It will not work with older Cantabria models, as they have different top pieces.

$ 14.86

65sq ft Filter Cartridge – suitable for all 2025 Caldera Palatino, Marino & Vanto Hot tubs

$ 45.00

  • 5-Way Test Strips
  • Test for Total Bromine, Free Chlorine, Alkalinity, PH and Total Hardness
  • From the world’s number 1 hot tub brand!
  • Work well alongside the Ace Saltwater system but good for any hot tub. 50 Strips in each pot.
$ 18.00

  • Suitable for Hot Spring & Caldera hot tubs
  • Test for Sodium Chloride (Salinity)
  • Great for the ACE Saltwater System and Freshwater Salt System
  • 25 Test Strips in this pack
$ 10.79

  • Replacement Hot Spring& Caldera – Freshwater Salt Cartridge.
  • Easily replaced using the on-screen instructions. 
  • Available in 3 pack (lasts 1 Year)
$ 27.00

  • Hot Tub Calcium Hardness Remover
  • A simple way to reduce the calcium hardness level in your hot tub
  • Simply rinse through, drop in over your drain or suction, flip after 12 hours and then remove 12 hours later
  • Made for hot spring & Caldera hot tubs  perfect for the Freshwater Salt system or ACE system. 
$ 11.53

  • Quick dissolving
  • Instantly increases your bromine levels
  • 1kg tub Can be used alongside bromine tablets
$ 27.00

  • Compare our higher 98% active ingredient to any other brand
  • No strong chlorine odour like other brands!
  • Large, easy-access child-resistant lid
  • Stays fresh longer than larger pails
$ 23.90

  • Hot Tub Chemicals Direct Anti foam helps eliminate pollutants (soap, sand, creams) from the foaming water.
  • It effectively dissolves the foam and sinks them that finally reach the filter underneath.
$ 45.00

  • BENEFITS: Improves the efficiency and life of the filter
  • USE: Soak solution overnight for maximum effect; use when draining and refilling spa or hot tub
  • COMPATIBILITY: Chlorine, bromine, ozone and mineral purification systems
  • INCLUDES: 32 fl oz of spa cleaning chemicals
  • Removes oil, grease, dirt and soap
  • An overnight soak will complete removal of all contaminants
$ 40.82

  • each pack contains 50 strips
  • Improved trusted strips technology with safety checks and consistent accuracy and safety checks are made for temperature, humidity, damage, presence of maltose
  • Highly visible and large dosing area ; Display Type: Digit ; Minimum Blood Sample Needed: 0.5 mg/dl. Measuring Range 10 to 600 mg/dL
  • Expiry: 18 months after production date, test strips are stable (even after opening) until the expiry date printed on the test strip vial
  • No coding required – Accu Chek instant strips do not require any manual coding
  • Small size – big power, ability to sample all types of blood (neonatal, capillary, venous and arterial blood)
  • Caution: Keep out of reach of children. Do not open test strip phial until you are ready to test. The strip should not be shared. Keep away from direct sunlight
$ 90.00

  • pH plus (also known as pH Increaser, Alkali, Soda Ash or Sodium Carbonate) is used for increasing the recommended pH level of your swimming pool water.
  • Add the solution to the pool at a rate of 50g per 4,545 litres (1000 gallons) of water.
  • Please read instructions on the products before use.
  • For more information on chemicals and water treatment, there are documents and downloads available in our Resources section.
$ 45.00

Hot Tub Sparkle Details

  • 1 Litre of High Quality
  • For adding lustre and clarity to spa water.
  • Hgihly effective water polisher.
  • Add directly to your hot tub water.
  • For a 1,000 litre tub, add 50ml initial dose and you can top up weekly with 25ml per week.
$ 99.00

  • Dissolves Quickly and Completely
  • Stabilized Spa Chlorine
  • 56% Available Chlorine
  • Controls Algae
  • Kills Bacteria
$ 99.00

  • I.w. Purchasing this will give you a saving off  £42.55
  • Dissolves Quickly and Completely
  • Stabilized Spa Chlorine
  • 56% Available Chlorine
  • Controls Algae
  • Kills Bacteria
$ 36.00

  • Spa Chlorine Mini (20g) Tablets are slow dissolving and specifically formulated for the disinfection of Spa and Hot Tub Water.
  • These tablets should be dosed via a specific floating dispenser or an erosion feeder device.
$ 31.25

  • The Spazazz Seduction Love Potion #9 Crystals are part of the Set The Mood line of crystals that are designed to arouse emotion and relax your state of mind. These crystals are made with all natural blends of botanicals, vitamins and minerals, with the purpose of relieving stress and tension, and to also leave skin softer and healthier.

Note:113g tubs

$ 11.84

Indulge yourself with Spazazz Cosmo Flirty Mood Crystals, the enlivening aromatherapy blend of sensual scents with therapeutic benefits, and moisturizing botanicals. Spazazz aroma therapy crystals set the mood, arouse emotion, and relax your state of mind. Feel the calm and natural release of aches and pains. Free the spirit with passion, as tension and stress melt away.

  • Spa safe
  • No oily residue

Note:113g tubs

$ 99.00

Spazazz Rx Crystals take hot tub & bath aromatherapy to a new level. Enjoy enlivening sensual aromas and therapeutic benefits of vitamins with moisturizing botanicals. Feel a calming natural release, as tension and everyday aches & pains melt away in the soothing hydrotherapy.

  • Natural botanicals & vitamins
  • Improves skin hydration

Note:113g tubs

$ 27.00

Spazazz takes hot tub & bath aromatherapy to a new level. Enjoy enlivening sensual aromas and therapeutic benefits of vitamins with moisturizing botanicals. Feel a calming natural release, as tension and everyday aches & pains melt away in the soothing hydrotherapy.

    • Natural botanicals & vitamins
    • Improves skin hydration

Note:113g tubs

Be it for your weekly cleaning or a quick pH checkup before soaking yourself up, find all the cleaning and mandatory materials in our store. We have all the best-selling products starting from a competitive price range. Our pH kits are some of the best in the industry and are an excellent fit for reducing alkalinity. At the same time, if your spa water is below the recommended pH level, we have the products to make it appropriate. So, are you interested in trying our exclusive products? Browse through our hot tub chemicals product category and select yours. 

As hot tubs tend to be pricey, keeping them in good condition is essential to avoid unwanted replacement. To keep your hot tubs looking refined and shiny, we have the best cleaners for you. Get rid of annoying oil, grease, and, most importantly, harmful bacteria with our best-selling hot tub cleaning products online. Keep your hot tub as good as new and enjoy the excellence it has to offer with our premium quality hot tub chemicals. 

Relax and unwind with the best hot tub chemicals in the UK at your fingertips. Browse our product category or call us today to make your purchase.

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    Hot tubs are found to be effective in lowering the risks of cardiovascular disease. On top of that, regular use of hot tubs also helps prevent stroke. All these reasons, along with the relaxing features hot tubs offer, have made them very popular among the UK people.  

    But hot tubs get dirty with frequent usage. Germs, oil, lotion, and even scum make the water unusable. Hence, cleaning becomes a routine task that requires a variety of chemicals. While hot tubs help you relieve stress, relax your muscles, and enjoy your leisure, you must keep it hygienic to avoid unwanted skin infections. 

    From cleaning the surface to keeping the water clean, we have all the hot tub chemicals for you. Buy hot tub spa chemicals online at the best deals from us. Choose from the premium brands and make your hot tub moments special with Rubia. Our Hot Picks, come with the guarantee for the best hot tub experience you will ever have. Browse through our large hot tub chemicals category and buy the suitable ones online directly from us. 

    If you are considering the self-care of your hot tub, buying essentials could be a challenge. To help you relax without any hassle, we have all you might need to keep your hot tub clean, hygienic, and enjoyable under one roof. Keep the pH levels checked and escalate sanitising efficiency with our best-selling hot tub spa chemicals.   

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