Hypersalinity

[windcoast reefs]

I'm pretty sure the Red Sea has a salinity of 1.028-1.029 (or higher in some areas). I know someone in town that runs there tank at 1.028, seems to have good results so far. Seems the corals like it more than anything

I think the fish need to be adapted to that environment to do well, I would think it would be very stressful on a fish if it was a rapid change.