When I first setup my tank 2 months ago the LFS sold me regular IO salt. They said it would be fine for my reef and corals, now that I have progressed further and researched a little bit it seems most reef tanks don't use just the basic salt so my question is, should I change to a better salt, if so which one? Also if and when I do change what is the best way to make that transition to the new salt in my tank?