I still have a bunch of marine pure in my sump (mid switching it all out), and nems and LPS were looking bad the past few months. Wanted to get a baseline with ceramic media and had my water tested before I finish switching out the marine pure next week. High Aluminum, Vanadium and Barium, all things that can coincidentally leach out of ceramic media. Not 100% on the Barium being the result of marine pure though, not much documentation on that one except that it can be in ceramic media. It's for my frag tank around 90 gallons, put the wrong ID down when I sent it in.
If the next water test after switching over to all siporax for a few months doesn't have these levels I'm not going to be enthused.