And with small tanks like 1-6 gallons, you typically won't be able to get many standard fish in.
You should also stick largely to one type of fish. So if you can find more ember tetras, try to stock at least 6-10 of those as your fish stock.
That in no way limits what you could do with the bottom of your tank.
The world of shrimp is something you'll get a healthy dose of on this forum
MABJ's iDevice used for this message :p