Causes:

  • Insufficient chlorine
  • Excess addition of acid to swimming pool water
  • Use of products containing cyanuric acid
  • Weather conditions


All dosages are based on an average pool with a capacity of 50 000 litres. Adjust according to your pool size, regional variations and weather conditions.

Note: To raise pH in fibreglass pools, only HTH® Alkalinity Up should be used.

Precautions:

In the case of a vinyl or coloured lining, add HTH® Alkalinity Up directly into the weir to prevent possible bleaching.

Treatment:

  1. To prevent possible staining from metals that may be present in your water, add 1 bottle of HTH® Metal Remover - follow label directions.
  2. With the pump running on the filter setting, add cup (250g) of HTH® Alkalinity Up around the slides of the pool.

    NB: in the case of a vinyl or coloured pool lining, add HTH® Alkalinity Up directly into the weir.

  3. Filter for 3 – 4 hours. Test pH and readjust if necessary.

Recommended Product/s:

  • HTH® Metal Remover
  • HTH® Alkalinity Up

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