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.
Dissolved solids are just what it sounds like. Dissolved solids are different minerals dissolved in water. They aren't one specific component, but a mix of different components. The minerals that are most often dissolved solids are calcium, magnesium, potassium, sodium, bicarbonates, chlorides, and sulfates.