I have been using oceanic salt for over a year now and was wondering if anyone has used this brand AND Instant Ocean Reef Crystals to give me a good quality comparison. I know its long shot but if anyone has tested the trace elements of both these brands newly mixed with ro/di water that would be awesome! I've also heard changing salt brands in an established tank has the ability to cause a serious crash. If anyone has successfully swapped oceanic for the I.O. with no negative effects let me know. So let the arguments begin, Oceanic, or I.O.??