Salary. The Bureau of Labor Statistics reports that marketing managers in the United States earned an average annual wage of $126,190 as of May 2011. The median wage, or midway point between the lowest and highest salary, was $116,010 per year.
What is TDS. TDS is the total of all dissolved solid matter such as minerals, metals, salts and. contaminants in the water. B. How TDS is Determined. TDS is most often determined in pool and spa water by using a conductivity meter. These. electronic meters measure the waters' ability to conduct an electric current.
CA is the portion of the TA that is due to carbonates from sodium bicarbonate (baking soda), sodium carbonate (soda ash), and other sources. On pools with concrete or limestone surfaces, low CA together with low pH will let your pool water DISSOLVE your pool surfaces, which is usually NOT a good thing.t's common in pool product labels to use the most obscure chemical name legally allowed, all for the purpose of allowing to sell you on their sodium hydrogen carbonate @ $1.50/lb instead of baking soda @ $0.40. Everytime I add baking soda, my pH goes up.