If you are going to remove ...

Published by

If you are going to remove calcium for drinking purposes you should leave a minimum level of calcium in the water such as by blending. Generally there is a minimum standard for artificially softened water. In the UK it is a total hardness level of 150 mg/l as CaCO3.

By the way be careful about the use of hardness and calcium concentrations as there are a lot of different methods of expression used. A common one is to convert everything  to Calcium Carbonate CaCO3 as this has a molecular weight of 100 and simplifies exchanger sizing calcs. But many others are in use.