1 2

ClearWater Fast Action Chlorine Tablets (167 Tablets) | Hot Tub & Swimming Pool Shock Treatment

£8.99
£8.99 £15.99
Sale Sold out
Tax included. Shipping calculated at checkout.

✓ Everyday Low Prices on Chlorine


We believe essential water care should be affordable. That’s why we price our chlorine competitively every day, giving you exceptional value, expert support and fast UK dispatch.


Restore your water quickly with ClearWater Fast Action Chlorine Tablets. These fast-dissolving tablets increase chlorine levels in as little as 30 minutes, making them ideal for hot tubs and swimming pools after heavy use, cloudy water or routine maintenance.

In stock (11 units), ready to be shipped

⭐ What our customers say

  • Fast, Reliable Delivery
  • Secure Checkout Guaranteed
  • Our Family’s Aftercare
View Product Details

Product Highlights

✓ Fast dissolving formula

✓ Suitable for hot tubs & pools

✓ Minimal impact on pH

✓ Dissolves in around 30 minutes

✓ 167 tablets per tub

How It Works

1. Test your water

Check your chlorine and pH levels using test strips before adding any chemicals.

2. Balance the pH

Ensure the pH level is between 7.2 and 7.6 before dosing for maximum chlorine effectiveness.

3. Add the tablets

Add the recommended number of Fast Action Tablets according to the dosage guide below.

4. Allow them to dissolve

The tablets dissolve in approximately 30 minutes, quickly increasing chlorine levels.

5. Retest before use

Test the water again before bathing to ensure chlorine levels are within the recommended range.

Dosage Guide

The number of Fast Action Tablets required depends on your current chlorine level and the volume of water in your hot tub or swimming pool.

Each tablet will increase free chlorine by approximately:

Water Volume Chlorine Increase
600 litres 2.0 ppm
800 litres 1.5 ppm
1,000 litres 1.2 ppm
1,200 litres 1.0 ppm

Top Tip: Always test your water before and after dosing to ensure chlorine levels remain within the recommended range.

Frequently Asked Questions

Can I use these tablets in a Lay-Z-Spa®?

Yes. Fast Action Tablets are suitable for Lay-Z-Spa® hot tubs and other inflatable or acrylic spas. Always follow the dosage instructions.

Can I use these in a swimming pool?

Yes. They are suitable for both hot tubs and swimming pools.

How long do they take to dissolve?

The tablets dissolve in approximately 30 minutes, helping to quickly restore chlorine levels.

Will they affect my pH?

Fast Action Tablets are formulated to have minimal effect on pH, although regular water testing is recommended.

Can I bathe immediately after adding the tablets?

No. Wait until the tablets have fully dissolved and always test the water before entering your hot tub or pool.

Safety Information

  • Store in a cool, dry place away from direct sunlight.
  • Keep out of reach of children.
  • Never mix with other pool or spa chemicals.
  • Always read the product label before use.
  • Wash hands thoroughly after handling pool or spa chemicals.