problem maintaining proper parameters

[mrcopitr]

Thanks Marie and Brad for all the good input in my problem, it is really appreciated.

One last question, when you test your water for calcium and alk lets say for example at 1h00 pm, the results are not going to be the same 5 hours later? Am I right? Mine are not, they usually fall as the day goes and climb back up when I add the 2 part solution, which is plenty normal..but it does not remain there very long.

thanks again Marco