Sizes of Chlorine Tablets

There are two main sizes of chlorine tablets on the market.

  • 20g small chlorine tablet (1 inch diameter)
  • 200g large chlorine tablet (3 inch diameter)

The 20g tablets are for hot tubs and small pools and the most popular sold, these are the standard tablets.

The large 200g tablets are mainly designed for large swimming pools 
Both of these tablets are designed to be used with a chlorine dispenser. 

Please do not get these confused by the poor quality Chinese tiny tablets which many people are buying by mistake as it is difficult to see the size from photos.