Hot Tub / Spa Chlorine Granules 1kg


Following recent changes to shipping regulations post-Brexit, we can no longer ship Chemicals to overseas addresses in Northern Ireland. Please do not checkout with chemicals in your basket if you are a resident of Northern Ireland.

WAVE™ Chlorine Granules can be used to disinfect your hot tub, or swimming pool water.

Our chlorine granules are completely soluble and are used to stabilise your hot tub’s pH levels. They contain a stabilising agent to protect your hot tub against the effectiveness of chlorine in the water when exposed to sunlight, making the granules ideal for daily chlorination.

Guidance; How much chlorine to add:
A heaped teaspoon holds approximately 8g of chlorine granules. As a general guide, to increase a 1500L hot tub from 0ppm to 5ppm you will need to add at least 12g of Chlorine Granules. So approximately one and half teaspoons should be enough.  

How to add to your hot tub:
Add your chlorine granules in stages (8-12g) into 10 litres of freshwater using a clean plastic container and mix carefully. Slowly pour the mixed solution into your hot tub water near to the return inlets, then thoroughly rinse out the container.

Heavily used hot tubs, maintained at high temperatures, may require more frequent dosing with Chlorine. Individual requirements may vary, test using a poolside test kit and adjust the dose rate as necessary to maintain a chlorine level of 1-3 ppm or mg/litre.

pH Control
To keep your hot tub at the optimum pH level, the water should be maintained at a pH level of around 7.4 and between 7.2 and 7.8 at all times. If the hot tub is too alkaline (8.0+) the efficiency of the chlorine is around 20%. If the pH level is too hight you could damage your hot tub and swimsuit, it is vital to check the pH level of you hot tub before use using a simple pH testing strip. 


  • These chlorine granules are harmful if swallowed.
  • Causes serious eye irritation.
  • May cause respiratory irritation.
  • Very toxic to aquatic life with long lasting effects.
  • Avoid breathing dust/ fume/ gas/ mist/ vapours/spray.
  • Avoid release to the environment.
  • Wear eye protection/ face protection.

IF INHALED: Place the person into the fresh air and keep them comfortable, monitor their breathing. Call A&E or your doctor if you feel unwell. If eye irritation persists, seek medical advice immediately. If chlorine comes into contact with acid, it will give off a toxic gas. Wear safety googles when mixing chlorine and water to avoid any splashes into the eye area.


Orders Up To £199.99 - £4.99 Postage

*2 Working Days Delivery via Hermes UK

Orders Over £200 - £9.99 Postage

*Next Day Delivery - Order by 1pm (when in stock) shipping via DPD Next Day | Parcel

To track your order and receive regular SMS updates, create your personal DPD account here.

*£13.99 for all Highlands and Islands addresses via DPD 2 Day Offshore Shipments.



If you are not happy with your purchase, then we would be happy for you to return the item within 14 days from date of reciept (providing the product has not been opened). Please contact the customer services department to be advised through the returns process.

If you have received a faulty item, you are eligble for a full refund with 30 days of reciept of the item. Please contact to be advised on the return for refund process. If you bring our attention to a fault outside the 30 day period you are eligble for a replacement - the warranty period for our hot tubs are as follows:

1 year for the heater unit/pump
6 months for the spa liner itself.

Please contact in order to be advised through this process.

In the unlikely event that your order or items within it are damaged, you may return them to us for a full refund. You must notify us within 14 working days. 

Please note, as stated in distance selling regulations, we cannot accept returns of Spas or SPA Accessories if you have opened the seal, with the exception of items that are faulty on arrival.

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