Home Theater Fish Tank.... help?

[Allforce]

If I was doing it instead of a sign I'd probably just put random pieces of movie memorabilia inside the tank as sunken treasures. Discreet but noticeable when people check out your fish.

Nothing expensive I'm talking like toys, for example a small crashed Millennium Falcon ship into at the bottom of the tank, hell looking at the pics you could do an entire Tatooine scene as if the bottom is sand. Little cantina and land-speeder toys, a jawa or two here and there.

Or go like an Indiana Jones route and put the fertility idol, the ark, the crystal skull, Coronado's Cross, etc down there as if they've been lost at sea.

The trick is do to it tiny so it's not really noticeable to anyone as anything other than "fish tank props" but when they look closer they go "Hey is that..." and you can just say "yep!"