:shock: I just posted a new thread to the articles section of the forum but all those articles must be reviewed before posting. It contains a wet web url with a gathering of the most recent large tests on marine salt mixes. Tests of major elements and trace elements. Kent was rated one of the top three, as was instant Ocean an Tropic Marine. A lot of people base what they think of a mix on calcium levels, pH and Alkalinity, but those are all readily adjustable. It is hard to deal with potentially toxic trace elements when they are at high levels when freshly mixed. The three above mentioned brands have the least amount of high levels to deal with, and the ones they have are considered less worrisome. Any way it goes it is good information to have so as to know what to expect from a mix and to now what not to blame on a mix. :twocents: I did give the URL on some other reply today but I do not remember which one. Sorry!