reeferwanabe said:... too much supplication...
An excellent point. IMHO, if you have to add a lot of supplements to you salt mix to "get it right" you are using an inferior brand and should switch. A decent salt should not need much in the way of additions.
It's factors like this that let you judge that a salt is inferior, but it can't demonstrate which salt is "the best".
I once came across a post (not here) where someone was saying that they used a mix of 1/2 Brand A and 1/2 Brand B because Brand A was low in one are and high in another and Brand B was just the opposite. To my want of thinking this was very foolish, because this only accounted for parameter that you can test, and not all the possible parameters in SW. I'd much rather use a brand that when mixed was at least close to the parameters I wanted.
Another thing that gets me about some salts it that the 50 gal package weighs in at quite a bit less that 15 lbs. and the instructions say it makes 50 gal of water at 1.022. Since we usually want our SG, especially in a reef to be much higher, I feel we are being short changed, almost to the point of fraud.