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.
Salt Pool Basics While the phrase âsaltwater poolsâ may bring to mind sand, waves and jellyfish, in reality, this alternative to standard chlorinated pools isnât really like the beach at all. The water in the ocean has a salt content of about 35,000 ppm, while the water in a saltwater pool has a far lower concentration of salt at around 3,000 â 6,000 ppm. The water in a saltwater pool is actually more like a saline solution, which contains about 6,000 ppm.