Water Chemistry

Does anyone know how much I need to use to raise the Ca in a 50 Gal system by 50ppm? The directions on the bottle only say to use up to 5ml per 50 gal per day, but don't say what the result is.

I started paying much closer attention to my tank parameters since I added an SPS a few weeks back. It's doing well and showing noticable growth. But my kalk top off isn't keeping up with Calcium demand since I started dosing baking soda to keep my Alk up at 8.0 or higher. I'll ...