What is a saltwater room?

What is a saltwater room? I’m not sure if they are real or not, but if they are, what are they? And don’t say, “A song by Owl City.” I know this. I’m trying to figure out WHAT they are.

Answer #1

lol songs usually arent very scientifically accurate…

Answer #2

when he says that it is actually a metaphor for a fishtank, or the ocean. there is no real “saltwater” room.

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