Acid

A term used by aquarists when talking about water conditions and its ph value. Water is said to be acidic if it contains hydrogen ions.


 * Water with a ph lower than 7 is said to an acid.


 * Acidic water can be high in carbon dioxide. This is called Carbonic acid.


 * In a planted aquarum the plants will give off carbon dioxide when the lights are turned off, this will make the water become more acidic.


 * The opposite of acid is alkaline.


 * Some species of fish have difficulty breeding in non-acidic water even though they can live quite happily in alkaline water. Neon tetras and Cardinal tetras are the most commonly know examples.


 * See article - How to make water more acidic

Links

 * Acid by Wikipedia
 * The Krib on water chemistry