Talk:DKH

Chemistry Low‑importance

	This article is within the scope of WikiProject Chemistry, a collaborative effort to improve the coverage of chemistry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ChemistryWikipedia:WikiProject ChemistryTemplate:WikiProject ChemistryChemistry articles
Low	This article has been rated as Low-importance on the project's importance scale.

Water Low‑importance

	This article is within the scope of WikiProject Water, a collaborative effort to improve the coverage of Water supply-related subjects on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.WaterWikipedia:WikiProject WaterTemplate:WikiProject WaterWater articles
Low	This article has been rated as Low-importance on the project's importance scale.

Redirect

This page should redirect to Carbonate hardness Faaustoo (talk) 12:05, 7 January 2023 (UTC)[reply]

All of this is wrong?

This article and the linked website about water definitions say that 1 dKH = 17.8 ppm CaCO3. But then 1 dKH = 1 dGH = 1 dH. The linked website however acts all confused about the definition of 1 dKH:

„1 dGH is defined as 10mg/lit CaO this can be related to ppm of CaCO3 as in above. Now the definition for dKH must have come from the amount of carbonate in 17.86 ppm CaCO3 which has nothing to do with GH wich is defined by CaO! Historically GH must have been defined first in terms of CaO; hardness in terms of ppm CaCO3 second, then KH third?“ https://www.thekrib.com/Plants/CO2/hardness-larryfrank.html

This website (German) says KH is usually measured in dH and it seems to me that „dKH“ or „°KH“ are sometimes used as units to mean „°dH carbonate hardness“.

Lastly and most obviously, the claim that 1 dKH is the same as 1 °fH is clearly wrong as the latter is 0.1 ppm CaCO3. Julia947 (talk) 11:49, 12 March 2023 (UTC)[reply]

I fixed this now to what I think is correct. I hope the article is at least improved this way. Julia947 (talk) 12:24, 12 March 2023 (UTC)[reply]