That's great but we should be using Reef Crystals, not Instant Ocean for our reefs.
aquavitro salinity
As long as we're maintaining Ca and Alk and Mg levels as they should be, it shouldn't matter what salt. If we need trace elements they can be dosed for a LOT cheaper than buying more expensive salt all the time.
I used Red Sea Coral Pro for my reef, but there are dozens of members who use IO with success in reefs, and such blanket statements aren't helpful nor are they polite. There are a thousand ways to keep a healthy reef.