Hey just to throw in my own calc/alk dosing observations: I once dosed 1:1 to get what i wanted. after my tank crash: 1. I had to dose more calcium than alk. 2. Then my alk was down and my calc skyrocketed (520 ppm) 3. And for now my levels are where i expect them to be after readjusting. This took months. .. and unfortunately for me, upgrading my reef angel caused all of my dosing timers to reset. So now I have to figure this out now. Btw, for mixing my BRS alk, I had to buy new alk component from BRS. The old one I had would not mix correctly. Even with the new stuff, I have to mix little by little, and shake the hell out of the container before adding more water & alk. Otherwise it would immediately settle.