I just came close to the end of one kit and decided that it was time to compare it with the new kit. To my surprise, the new one was 1 dkh higher than the old one. Thought it was a fluke so I tried again and got the same result. Today is the second day to compare them and I got the exact same results as yesterday at the same time of day (1 dkh different). Now I just don't know what my tank alk really is. The only thing that I know is that it was stable through the old kit! Has anyone else had this issue? Any suggestions on which kit may be the right number?