The "S-15" report is pretty old stuff, and I have not heard of anyone accepting it as true scientific testing. Just reading over it again, I have to laugh when they describe the marine mix as "perfect" which I don't think would ever even be whispered in a scientific "report". It reads like a commercial for whatever brand salt tested the best....in the same manner as the scientific hooplah for the Ecoaqualizer. If I remember correctly, a little stir was caused and people tried the new salt and experienced bleaching, but I don't have the time to dig through the archives of RC to where I read it many years ago.
On an interesting note, a Google search for "Global Scientific Publications" yielded no results other than ties to the S-15 report.....if I were a betting man I'd guess the group is/was fabricated to try and put forth an image of credibility.
Instant Ocean remains the salt of choice for most commercial applications, and if their livelihood is on the line I would have to assume that the wheel has not been reinvented.
I'm able to get the 200g bucket of Tropic Marine for $50 at my LFS
(thatpetplace), it's a shame other places seem to have to mark it up so much. That comes out to about .25 a gallon, and Instant Ocean (only 160g bucket) at $32 comes out to .20 a gallon. Hence the only reason why I can see "splurging" Tropic Marin because it is so comparable in price. I'd go back to IO without worry if I was faced with paying $80+