quadruple fugue: A fugue with four subjects. Quarter note: A note played for one quarter of the duration of a whole note. Quarter rest: A silence of the same duration as a quarter note. Quintal Harmony: Harmony based on the interval of a fifth, rather than thirds.
How To Treat Acid Well Water. On private water systems, one of the most common causes of pipe and fixture corrosion is from low pH, which can be defined as acidic water with a pH of less than 7.0 pH. Signs of acid water are corrosion of fixtures, blue staining (from copper pipes) or rust staining (from iron pipes).
A pH (potential of Hydrogen) measurement reveals if a solution is acidic or alkaline (also base or basic). If the solution has an equal amount of acidic and alkaline molecules, the pH is considered neutral. Very soft water is commonly acidic, while very hard water is commonly alkaline, though unusual circumstances can result in exceptions.