DGH
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2008-03-05T14:26:47Z
Jspreadborough
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{{lowercase|title=dGH}}
'''Degrees of General Hardness''' (dGH) is a [[Units of measurement|unit]] of [[Hard water|water hardness]], specifically of General Hardness.
'''General Hardness''' is a measure for the number of [[calcium]] and [[magnesium]] [[ion|cations]] per volume of water. 1 dGH corresponds to 10 mg of calcium oxide or magnesium oxide per litre of water.
-note: In water testing, the paper strips measure hardness in parts per million(ppm) one part per million is one milligram (mg) of calcium per litre of water.
10ppm = 1 dGH
== External links ==
*[http://www.aquarticles.com/articles/management/Hardy_Water_Chemistry.html Some Basic Water Chemistry]
[[Category:Units of measure]]
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