It is the name of a prominent Christian saint, Saint Jerome, the translator of the Vulgate.Jerome ranked among the top 200 names given to boys born in the United States between 1903 and 1985. It has since declined in popularity and was ranked as the 616th most popular name for American boys born in 2008.t is the name of a prominent Christian saint, Saint Jerome, the translator of the Vulgate.
Expected Levels. Total hardness in freshwater is usually in the range of 15 to 375 mg/L as CaCO3. Calcium. hardness in freshwater is in the range of 10 to 250 mg/L, often double that of magnesium. hardness (5 to 125 mg/L). Typical seawater has calcium hardness of 1000 mg/L, magnesium.
Calcium content is best in the range of 100-400 ppm and is water temperature dependent. Unlike pH or total alkalinity, however, both of which can be raised or lowered with reasonable ease, calcium levels cannot. Adding a hardness increaser to the water easily raises calcium levels. Conversely, there is no simple chemical addition that can be made that will reduce calcium hardness. The only way to reduce calcium hardness levels in pool water is through dilution with water of a lesser hardness.