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.
Only 25 of the players on a Major League Baseball team's 40-man major league reserve list may be active for the major league club, with two exceptions. One minor exception is that when a team is scheduled to play a day-night doubleheader, it is allowed to carry 26 players on the active roster for that day only.