I may have missed it but what is your mag at? I was testing my water with red sea pro test kit and found out with a new test kit that my alk was at 6, calc 460, an mag 1000. My test kit was showing alk 8.5, calc 460, and mag 1250. the test kit was only 8 months old by my lfs said that there was a bad batch out about a year ago.