Relax Chlorine Small Tablets 5Kg (250 x 20g)


Relax Chlorine Tablets (small) provide slow release sanitising for hot tubs, spa and swimming pools.


Have you considered our own brand version of this product?

Castle Hot Tubs Range

In stock


Relax Small Chlorine Tablets for Hot Tubs, Spas, and Swimming Pools

Our 5kg Trichlor (20g) Chlorine Tablets (250 Tablets) are designed for use with a floating dispenser or some feeder systems, ensuring you maintain the ideal chlorine level between 3.0 to 5.0 mg/l.

How to Use:

First, fill the dispenser with tablets. Then, adjust the aperture mechanism at the bottom of the dispenser to achieve the desired range of 1-3 mg/l (ppm). These tablets erode slowly over 4-7 days, depending on water flow. Remember to remove the dispenser from the water while swimmers are bathing.

General Precautions:

Avoid mixing these tablets with other chemicals to prevent dangerous reactions. Handle the product in a well-ventilated area, and wash your hands after use. Keep the tablets dry in storage and store them in a cool, dry place.


Wondering whether to use Chlorine Granules or Chlorine Tablets? Check our useful guide where we answer all your questions about chlorine.

pH Levels:

Always maintain your pH levels between 7.2 – 7.8 to ensure bather comfort and safety.

Confused about Your Hot Tub Water Chemistry?

Our guides answer the most frequently asked questions!


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