HIGH TOTAL ALKALINITY (TA)

Causes: Excessive addition of alkaline products e.g. chlorine, soda ash, bicarbonate of soda

Corrective Action:

• Switch the pool pump off.
  
• Add 500g of HTH® Dry Acid or 500ml of HTH® Easy Acid in one spot in the deep end of the pool away from the metal fixtures.
  
• Leave the pool pump off for 10 - 15 minutes.
  
• Thereafter, switch the pump on and continue with normal filtration and chlorination.
  
• Only check the TA level again after 3 - 4 days. Repeat the above steps every third or fourth day until the TA is within the correct range of 80 - 120 ppm.
  
• Never let the pH drop below 7.0.

NB: One bottle cap of HTH® Dry Acid and HTH® Alkalinity Up holds 500g of product

Recommended Products: 1. HTH® Dry Acid / HTH® Easy Acid 2. HTH® 4-in-1 Test Kit or HTH® Quick Test Strips

LOW TOTAL ALKALINITY (TA)

Causes: Excessive addition of Acid to swimming pool water / Weather Conditions

• Add 1 Litre of HTH® Metal Remover to the pool - follow label instructions.
  
• Switch the pool pump off. Add 1kg of HTH® Alkalinity Up in one spot in the deep end of the pool away from the metal fixtures. 1 kg of HTH® Alkalinity Up should increase the Total Alkalinity by 10ppm.
  
• Leave the pump off for 10 - 15 minutes.
  
• Thereafter, switch the pump on and continue with normal filtration and chlorination
  
• Only check the TA level again after 3 - 4 days. Repeat the above steps every third or fourth day until the TA is within the correct range of 80 - 120 ppm. Increasing the TA can be a slow process.
  
• Never let the pH rise above 7.6.

Recommended Products: 1. HTH® Metal Remover 2. HTH® Alkalinity Up 3. HTH® 4-in-1 Test Kit or HTH® Quick Test Strips

All dosages are based on an average pool with a capacity of 50 000 litres. Adjust according to your pool size.

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