pH: 

• pH is a measurement of how acidic or basic (alkaline) a solution is.
• pH is shown in a scale from 0-14.  A pH of 7.0 is said to be neutral.  Distilled water has a pH of 7.0, Blood has a pH of 7.5.
• If the pH is less than 7.0 it is said to be acidic.  Examples: lemon juice pH 2.2, beer pH 4.4, battery acid pH 0.3.
• If the pH is greater than 7.0 it is said to be basic.  Examples: baking soda pH 8.4, bleach pH 12.6, and ammonia pH 11.4.
• Generally, the ability of aquatic organisms to complete a life cycle diminishes greatly as the pH becomes greater than pH 9.0 and less than pH 5.0.