There's actually a built-in filter in the back of the aquarium in that picture. (Like many other all in one systems on the market)
It's not built like a conventional shadowbox, but it does offer the same look of depth and gradient of blues that mimics the look of being underwater.
The patent pending design I've come up with allowed me to compress the lighting effects that the old DIY shadowboxes accomplish, so it's built into a solid waterproof wall less than 1" thick.
Still working on the full product line. Going to offer:
-H.O.B filters that give standard small aquariums this same background.
- Medium sized aquariums with hidden built-in filters
-And large custom aquariums with built in overflows and plumbing connections for sumps
In the mean time, feel free to contact me with any questions or custom requests.
Here's some pics of the background at different brightness levels....
