Relax 1kg Stabilised Chlorine Granules


Rapid Dissolving Concentrated Sanitiser


Have you considered our own brand version of this product?

Castle Hot Tubs Range

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Rapid Dissolving Concentrated Sanitiser

Relax spa stabilised chlorine granules are highly effective granules and are ideal for daily dosing of your spa, hot tub or swimming pool to produce free active chlorine which kills bacteria and other potentially harmful organisms.

These Granules are rapid dissolving and have minimal impact on pH.

Keep PH levels between 7.2 and 7.6

Confused about your hot tub water chemistry? Our guides answer the most Frequently Asked Questions!

Read our how-to guide on balancing your hot tub / spa / swimming pool water pH levels


Unsure whether you should be using Chlorine Granules or Chlorine Tablets?

Check our useful guide where we answer all your questions about chlorine.

Keep Chlorine Levels between:

In a Pool, 1-3 parts per million

In a hot tub, 3-5 parts per million

A genuine Relax branded product.


Relax Stabilised Chlorine Granules Label
Relax Stabilised Chlorine Granules – Directions for use –
Click to view full size.

Why don’t you try our own brand instead

All of Castle Hot Tubs branded products are Grade ‘A’ quality – packed and labelled in the UK