pH Increaser

This is pH Increaser - or Sodium Carbonate - also known as Soda Ash. For chlorine to work most effectively as a bactericide in water, the pH needs to be kept in the range 7.2 to 7.8, and ideally 7.4 to 7.6. ,

Where the water in a swimming pool has a low pH - near to 7.2 - it needs to be raised. This can be done by adding Soda Ash at the rate of 1.0kg to 100m3 of water (equivalent to 2.2lbs per 22,000 gallons).

Dosing arrangements: Take a clean bucket and three-quarters fill it with warm water - these granules dissolve more easily in warm water. Pour in the measured quantity and stir with a stick or spoon to help it to dissolve. Then pour off the liquid , by the inlets with the pump running to help thorough mixing in the pool. Allow 12 to 24 hours for thorough distribution and test the water again, adding more soda ash as required.

CHIP information - supplied under the direction of the Health & Safety Executive:

This product is an irritant
R36 - this product can be irritating to the eyes and respiratory system.