[Crusty Old Shellback]

Questions on your electrical, do you have GFCI breakers instead of outlets? I had an issue with my GFCI outlets on the 400 after a few years of being in that environment. That's when I lost my Naso's, Gold flake and Moorish Idol, along with some other fish due to the GFCI tripping in the middle of the night. Swapped over to GFCI breakers and never had any issues after that.

Just be aware that any electrical equipment you have in there that is not sealed will eventually rust/corrode. You may want to start a plan to replace stuff on a regular basis, especially outlets. Just thought of this when I saw all the equipment hanging on the wall.

But the room looks good. Make sure that floor and walls are sealed well. Salt creep/salt air will get into everything and cause issues.

After 38 years of riding ships at sea, plus all the years I've had salt water tank (1st one in 1977), the only thing I've seen that salt water has minimum effect on is titanium and glass.