Dave's photo of his terrific little 1.5g Nano Reef Tank, which contains his Bumblebee Shrimp, Astrea Snail, Lettuce Nudibranch, Greenstar Polyps, Purple Mushrooms lots of Coralline Algae, Aquaclear Mini HO filter, Fluval 104 canister filter filled with only coarse crushed coral, plumbed from corner overflow. Dave's tank rests on top of a custom stand.
Smaller tanks make great Do It Yourself (DIY) Projects. They are fun, easy, inexpensive and go together quickly. Just modify the DIY 55g Glass Aquarium Plans to meet your needs. There are a number of Canister and Power Filters and Mini/Nano Reef Tank Lights which will allow you to keep corals in your new tank.