Calcium Up (Hardness Increaser)


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Use Calcium Chlorine to increase calcium hardness in your pool and spa while also reducing corrosion in concrete, pebble & tiled pools & spas. 

Hardness increase helps to protect pool surfaces & equipment

Calcium Up benefits:

  • Available in two sizes
  • Use to protect your pool surfaces
  • Easy to add to your pool
  • Helps reduce the risk of corrosion and scaling
  • Maintains healthy water
  • Active constituent: 990 gm/kg Calcium Chloride.
  • 500g water hardner increases hardness by 10ppm in a 50,000 litre pool. Hardness level should be kept in the 150-500 ppm range.


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