Are you testing for the trace minerals that you're adding? If not, I wouldn't add them. Regular water changes should do the trick. As far as dosing the kalk, I'm not real sure if the two solid months of dosing is what caused my coraline to go crazy, or if it's the fact that my tank is about 7 months old now. I think it's probably a combination of both. So, if your tank has been set up a while, then a couple of months of dosing should give you what you're looking for.