Thanks again, I found the lamps I was looking for, and picked up a couple frags. Special thanks to Jason at Coral Reef, who came in early on Sunday so we could pick up our livestock for our trip home!
I had the same happen, not shaking enough when I used it. I broke it up with a chop stick, and added some RO. Have been using for months now without any ill affects. Just shake enough till you hear the marble inside...