The nice growth of green macroalgae pictured here in Kerry's 12 gallon NeoCube reef aquarium makes a nice hiding place for his Percula Clownfish, Blue Yellowtail and Blue Damsel. His colony of Blue Mushroom Corals, the Feather Duster and Turbo Snail look right at home as well.
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.