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Cleaning, Hygiene &
Maintenance Chemicals


pH Reducer Granules 1.5Kg

  • Reduces Total Alkalinity
  • High pH makes chlorine less effective, corrodes equipment and can cause cloudy water
£5.99 ex. Vat | £5.99 inc. Vat



pH Reducer Granules

It is imperative to check and correct pH levels regularly in order for the pool water to stay balanced an allow the chlorine to function efficiently.

Use pH Reducer Granules to reduce total alkalinity.  The ideal spa pH level is between 7.2 – 7.6, promoting bather comfort, optimal chemical efficiency and protection of spa equipment.  pH Minus is a granular acid used for lowering the pH if it’s above 7.6.

Also known as Sodium Bisulphate or Dry Acid


Please click on link below to download Safety Data sheet.

DS080 CPC pH Minus Rev 7_

pH Minus

All chlorine based sanitisers become less effective at killing bacteria and viruses as the pH increases (becomes more alkaline). Acid/Alkaline conditions are measured on the “pH” scale which ranges from 0 – 14. Ideal bathing conditions exist at a slightly alkaline level of 7.2 to 7.6 with Total Alkalinity of 80/140 mg/l (ppm). If spa water becomes less alkaline (above 7.6) it also gets more corrosive and less comfortable to swim in.

Prosan pH Minus is used as a reducer for the pH level of your spa water when it goes above 7.6, it can also be used as a decreaser for Total Alkalinity in your spa water.



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SKU: G-PN936 Category:


This business expansion has been supported by New Anglia Local Enterprise Partnership, through the Business Resilience and Recovery Grant Scheme.