As we have already mentioned — space in an aquarium is not endless, with the back glass limiting the view primarily.
As we have already mentioned — space in an aquarium is not endless, with the back glass limiting the view primarily. To widen this space optically you can make use of the room behind the aquarium to create a greater sense of depth. Many aquascapers use a translucent frosted backdrop and light the aquarium from behind with a background light. Visually, the milky white backdrop adds another layer, the layout does not end with the very last plant group in the background of the tank. This little trick increases the number of optical layers by another one. You can also create this effect with a backdrop of any other color, for example black or blue. However, the translucent frosted foil that is lit from behind creates an especially great sense of depth as the diffused light in the background makes the backdrop look slightly unreal and indistinct. With this simple optical trick you combine the clear, focused image of the planted layout with a blurry background, and thus create a greater sense of depth as blurry, unclear lines look farther away to our eyes, whereas clear, focussed lines always look as if they were all at the same distance from the viewer. You can even make use of this effect when taking a photo of your tank. For doing so, work with the aperture of your camera, the f-stop. A lower f-stop number means that the background gets blurrier.