Not true. Arm and Hammer has been doing some deceptive marketing of baking soda as a method of clarifying a pool. This is bogus.
High TA + high CH + high pH can precipitate calcium carbonate, and make your pool cloudy. But I can put a teaspoon of baking soda into 8 oz of water and dissolve it, and the water remains perfectly clear, even though I've added around 600 ppm of TA! Why? there's not enough calcium present to react with the baking soda.
You can lower your TA if you like (http://pool9.net/alk-step/) but it's unlikely that that's why your pool is cloudy, unless your CH is also high OR unless you added baking soda AND calcium increaser (calcium chloride) at the SAME time.
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