The pH of water determines the solubility (amount that can be dissolved in the water) and biological availability (amount that can be utilized by aquatic life) of chemical constituents such as nutrients (phosphorus, nitrogen, and carbon) and heavy metals (lead, copper, cadmium, etc.).
A huge Oa... A Major League Baseball team has 25 players on its active roster. Exactly how many of these are pitchers, and how many are position players, is up to the manager of each team and not dictated by rule. However, it is common for there to be 12 pitchers and 13 position players.
There are 30 teams in Major League Baseball, 15 (an odd number) in each league. Baseball is different from the three other major North American sports for two reasons. First, it is the only sport in which each team plays six to seven games every week in sets of two, three or four-game series.