Again I'm sorry but you are wrong. Randy does use kalkwasser but does not use it as only 1/2 of a balanced additive mix.
This is taken from Randy's Article -- How to Select a Calcium and Alkalinity Supplementation Scheme
"Limewater (also known by the German term kalkwasser) has been used very successfully by aquarists for a number of years, and it is the system that I use on my tank."
"The calcium ions in the solution obviously supply calcium to the tank, and the hydroxide ions supply alkalinity."
That is all I have time for now but if you don't believe me do some research. You will find that kalkwasser can be used as a balanced additive that supplies calcium and alkalinity.
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