So today when I got home I noticed what looked like precipitation in my tank. I tested the water and the following were the results:

Calcium 480ppm
dkh 7 (125.3ppm)
Mg .82 (1600ppm)

The only thing that has changed in my tank was adding purple tech (the kent marine kind) two different times. My calcium was at 440ppm and since went up to the 480ppm after adding the purple tech.

Should I be worrying about anything? The test results above are where they should be right? Please help me out on this one. I have never had this happen before.