Sodium Bisulphate also known as dry acid occurs as an odourless, hygroscopic white powder that is soluble in water. Its solutions are strongly acidic and corrosive. It is manufactured by reacting sodium hydroxide with sulphuric acid. Sodium bisulphate acts as a technological additive, a preservative, a disinfectant, an acidity regulator, and a cleaner. It is used in agriculture, metal, oil, cleaning and textile industries.Sodium Bisulphate is frequently used as a replacement for sulphuric Acid in many applications as sulphuric Acid is highly dangerous to transport.How to use sodium bisulphate / Dry acid in pools & spasSodium Bisulfate is used to lower the pH and to maintain total alkalinity TA in swimming pools and spas. It is safer and easier to use than hydrochloric acid (muriatic). It is easier to store but it also must be handled with care. The ideal pH of pool water should be 7.0-7.6 and total alkalinity should be maintained between 80 and 120ppm.Pre-dissolve the dry acid first by adding the dry acid into a large plastic bucket of water and then pouring the acid solution into the deep end of the pool, away from the skimmer and the fixtures. The Acid should be added when the pump is on and running. Retest the pH of the water in 4 hours and add more acid if needed. Helpful Tips: Do not add more than 150g of dry acid per 10,000 litres of pool water at any one time. Never add dry acid more than 3 times per day. Do not adjust the pH without first testing the Total Alkalinity. Dry acid may be used in a spa or hot tub.
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