Sodium Carbonate

sack of washing soda or soda ash

- AKA 'Soda Ash' or 'Washing Soda' -  is more alkaline than Sodium Bicarbonate

  • It is cheaper to buy at a cleaning-products supplier than at a pool shop
  • Soda Ash increases low pH levels caused by regular use of an acidic Chlorine donor such as Trichloro
  • Add 350g of soda ash for each Kg of Trichlor used, or 5oz for every pound
  • Do not add more than 500g (1 pound) per 50m³ (13.000 US Gals) in any 24 hour period and keep bathers out of the pool for 12 hours after application
  • Therefore this chemical is best added at night after the pool has been finished with for the day
  • If TA is over 120 ppm, adding soda ash may cause your water to become cloudy
  • Sodium Carbonate is mildly toxic and ingestion of large doses causes gastro-intestinal problems, abdominal pain, flatulence, diarrhoea, vomiting, collapse and even fatalities
  • High doses of inhaled dust can cause respiratory irritation, coughing and breathing difficulties plus damage to nasal tissue
  • Eye contact is a serious problem - rinse immediately with copious quantities of clean, fresh water (NOT pool water) and seek medical advice as soon as possible

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Ken Walker - MyPoolGuru©