Water Parameters Question

[Baldy]

Lol, I actually got the rock in today. Looks so much better than the tank with just sand :P. I haven't read much about magnesium, but I've read into the relationship between alk and calcium. From what I've read if the alk isnt high enough, the calcium will precipitate out of the water. That is what lead to me asking about this in the first place. But I'm not having any problems so far, so I guess I'll just leave it for right now.