I know we're all Salty enthusiasts, but IMO, if you're wanting to just give them a little piece of serenity, maybe doing a FW tank would be better. Cheaper for sure and the maintenance would be so much simpler. You could always do colorful Cichlids or community fish that reproduce easily and if you lose a FW fish it's usually much cheaper to replace. Sorry if I offend, but it's just my opinion.
