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).
How to maintain your pH balance with a water ionizer. Nearly all alkaline water ionizers make four levels of alkaline water. Each of these levels has a use for maintaining a healthy body pH balance. The key to maintaining a healthy body pH balance is knowing what level of water to drink, and when to drink it. You monitor your urine using pH test strips.