I just finished up a bucket of the Oceanic salt, and I won't go back to it. My calcium levels went through the roof when I first started using it. I never had any calcium precipitation problems, but it was reading well above the recommended Ca levels, and I couldn't get coralline to grow hardly at all. I just bought some MarineMix salt from Cap Bay today, because the guys there spoke highly of it. They said they all use it in their tanks at home, so I felt pretty safe with it. I'm doing a water change tonight, so I guess we'll see. According to the guys at Cap Bay, all of your levels should be right on when you use that salt. Again, we'll see how it goes. It's a little more expensive though.
Brad