Hot Tub Chlorine

Hot Tub Chlorine Sanitisers for Healthy Bathing

We have selected the following ‘Quality Approved’ hot tub chlorine sanitisers as suitable for all hot tubs and spas.

We advise hot tub chlorine mini tablets (20g) for use in acryllic hard shell hot tubs for minimum hassle maintenance. But if you have a vinyl hot tub like many of the popular inflatable spas available, we recommend using hot tub chlorine granules instead. Chlorine granules are fast dissolving, which allows gasses to escape prior to replacing the cover. This prevents bleaching of the walls above the water line over time. For more information please read our guide regarding the different types of hot tub chlorine and how to use them.


All the hot tub chlorine in this category is "stabilised", designed to give you a longer period of protection between doses. For problem solving and dealing with murky or green water see also our non-stabilised shock chlorine, which is designed to burn off quickly after super-dosing the hot tub allowing you to re-use the hot tub sooner.

The following spa chlorine granules are fast dissolving high quality grade 1 chlorine products from reputable brands.

Please note: Always use chlorine spa test strips when sanitising with hot tub chlorine. Test before you get in and dose when you get out!

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  1. Pool and Hot Tub Multifunctional Mini Chlorine Tablets 20g (5 kg)
    Highly effective slow dissolving stabilised Multifunctional Chlorine Tablets 20g (5 kg), with added clarifiers and algaecides for extra protection against algae growth in the pool or spa water. Learn More
    £49.95
  2. Pool and Hot Tub Multifunctional Chlorine Granules (5 kg)
    A top-quality sanitiser for swimming pool and hot tub water the Multifunctional Chlorine Granules (5 kg) contain algicide and flocculant (clarifier) for extra protection against algae growth. Learn More
    £46.95
  3. Pool and Hot Tub Mini Chlorine Tablets 20g (5 kg)
    Highly effective, the slow dissolving Mini Chlorine Tablets 20g (5 kg) are formulated to sanitise the pool and hot tub water and ensure safe bathing by protecting against unwanted bacteria and algae. Learn More
    £43.95
  4. Pool and Hot Tub Stabilised Chlorine Granules (5 kg)
    Chlorine Granules (5 kg) with built in stabiliser, a superior quality sanitiser for pool or hot tub water. Learn More
    £36.95
  5. Pool and Hot Tub Multifunctional Mini Chlorine Tablets 20g (2.5kg)
    Highly effective slow dissolving stabilised Multifunctional Chlorine Tablets 20g (2.5kg), with added clarifiers and algaecides for extra protection against algae growth in the pool or spa water. Learn More
    £29.95
  6. Pool and Hot Tub Mini Chlorine Tablets 20g (2.5 kg)

    Highly effective, the slow dissolving Mini Chlorine Tablets 20g (2.5kg) are formulated to sanitise the pool and hot tub water and ensure safe bathing by protecting against unwanted bacteria and algae.

    Learn More
    £27.95
  7. Pool and Hot Tub Stabilised Chlorine Granules (2 kg)
    Chlorine Granules (2 kg) with built in stabiliser, a superior quality sanitiser for pool or hot tub water. Learn More
    £15.95
  8. Pool and Hot Tub Mini Chlorine Tablets 20g (1 kg)
    Highly effective, the slow dissolving Mini Chlorine Tablets 20g (1 kg) are formulated to sanitise the pool and hot tub water and ensure safe bathing by protecting against unwanted bacteria and algae. Learn More
    £12.95
  9. Pool and Hot Tub Stabilised Chlorine Granules (1 kg)
    Chlorine Granules (1 kg) with built in stabiliser, a superior quality sanitiser for pool or hot tub water. Learn More
    £10.95
  10. Blue Horizons Chlorine Reducer (1 kg)
    If you have dosed too much chlorine and do not wish to wait for levels to come back down to a safe zone, or dilute the water, you can use Blue Horizons Chlorine Reducer (1 kg). Learn More
    £9.95
    Out of stock
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