Here’s my other nerdy hobby
We remodeled our house about 10 years ago and I pretty much had no input on what was gonna change. The only exception was this aquarium. I've had fish ever since I was a kid, but I wanted to do something different. I wanted a salt water aquarium but I wanted it mounted in the wall. The idea was to hide all the mechanical stuff (filters, pumps, light hood, etc) so you couldn't see and hear it. The whole set up turned out pretty cool. It's a 100 gallon system with mostly corals: frog spawn, green star polyps, moon coral, and candy cane coral. For fish, there's a Flame Angel, 3 Clownfish and a couple Royal Grammas. There's a starfish that hangs out in the tank, too--mostly under the sand.
Last month, I switched over to an LED light system which helps keep the temperature down, simulate different light patterns found in the ocean naturally, and adjust the light spectrum to different color settings that help promote coral growth.
Now, if only I could figure out how to get a model train to run through this thing...