I have had to up my dose of Limewater because my Alk is falling, and I have a question about Ph of saturated Limewater. I dont currently have a conductivity meter to check Limewater, but was wondering why when I mix two teaspoons of Kalk in a cup of RODI water I get a PH of 11.5, shouldnt the Ph read 12.4? Does this tell us the Kalk powder has lost potency? Thanks