I'm making an aquarium auditorium (like in the pictures below). I thought I could place a light source inside the water, to have the light effects from the first picture in the whole room, but that doesn't really work. As you can see in the second picture.
So my suggestion is to have an area/spot light that you can place outside of a water body and which immitates that underwater effect.
So my suggestion is to have an area/spot light that you can place outside of a water body and which immitates that underwater effect.