Aiden's 15g Nano Reef Tank with his with Purple Coralline Algae encrusted Live Rock, Candy Cane Corals, Button & Green Star Polyps, Actinodiscus Corals, Aiptasia (glass) Anemones and a Peppermint Shrimp.
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.