Good job Broomer5. That is the kind of response that needs to be posted. As a physician that does a lot of research, I know the importance of a credible research article from a credible research journal. Not to dog you Petey, but your response has no scientific back-up. Opinions are great, everybody uses what they like and what works best for them, but make sure that everyone knows that it is an opinion, not fact. The article proves that reef crystals don't have the best trace elements by far. Again, good job Broomer.