I haven't done a water change in a while, since I don't have any fish in the tank and just a few small frags. I dosed so my mag will now be over 1300.Arent we shooting for MG of 1300+ and Cal 400+ Whats your water change schedule or dosing schedule? I wanna see if I'm right in my assumption that you should hold off on dosing kalk since your alk is elevated but your calcium is lower. I would want an calcium only boosting solution. But I believe you need to raise Mag above 1280 for Ca to stabilize. Simple solution might be just a large water change....depending on what salt your using and what alk, cal, and mag its mixing to at 1.026