Questions and answers on how to convert things from one unit or system to another
Forum rules
Dear convert-me.com forum visitors,
Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.
All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on
convert-me.com FaceBook pageThank you for being with us and sorry for any inconveniences this could caused.
Mon Mar 03, 2008 6:49 pm
Hi I am trying to find a formula to convert KH and GH harness measurments from ppm to degrees of hardness??
Any takers??
Mon Mar 03, 2008 8:17 pm
1 degree of hardness = 17.86 ppm CaCO3
1 degree of hardness is defined as 10 mg/L of CaO, whereas the US ppm system is based on CaCO3. 10 mg CaO and 17.86 mg CaCO3 contain the same amount of calcium.
A rather math intensive derivation is given at
www*thekrib*com/Plants/CO2/hardness-larryfrank*html
(replace all the "*" with ".", I had to trick the censor that doesn't want me posting links.)
More info
Powered by phpBB © phpBB Group.
