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OPC Hardness Plus 5Kg

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OPC Hardness Plus 5Kg

Increases Calcium Hardness levels in Swimming Pool, Spa and Hot Tub water. Incorrect levels of calcium hardness may lead to surface and circulation problems.

OPC Hardness Plus will assist in the overall chemical balance in those low hardness areas


  1. To increase the Calcium Hardness level by 20ppm add 1.5kg OPC Hardness Plus per 50m3
  2. Dissolve OPC Hardness Plus in 10 litres of warm water in a clean plastic bucket.
  3. Add to water near the return inlets.
  4. Keep the circulation pump running.

Storage & Handling 

  • Store in a cool, dry place away from other chemicals. 
  • Do not mix with other chemicals. 
  • Always wear suitable gloves and eye protection when handling chemicals.

Use biocides safely. Always read the label and product information before use

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