水草情迷

大家用什么工具測水的硬度？我見到FS有TERA的KH測試劑，但無GH，甘是米測試KH呢？但是店主話是測海水的，淡水不適用

http://www.drhelm.com/aquarium/chemistry.html

kH
Carbonate hardness or temporary hardness. Measures the buffering capacity or the ability to absorb and neutralize added acid without major changes to pH.

gH
General hardness (GH) refers to the dissolved concentration primarily of magnesium and calcium ions. Other ions can contribute to water hardness but are usually insignificant and difficult to measure. When fish are said to prefer ``soft'' or ``hard'' water, it is gH, not kH that is being referred to. gH will not directly affect pH although "hard" water is generally alkaline due to some interaction of gH and kH.


http://www.sera.de/English/autoframe.ht ... H-test.htm

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