From the USA, HTH is the world wide premium quality brand of Chlorine Granules. Granules are a time proven method of swimming pool water sanitation. Use daily to ensure clear, hygienic water for your pool users.
Chlorine Granules should be added to a bucket of water, stirred and then left to settle for 2-3 hours. The chlorine content will move from the granules into the water creating a liquid chlorine that may be added into the pool without the messy calcium residue.