They are basically the same as many other tanks, native tanks usually just have native fish in them, you can collect minnows and other small fish that will fit into a 10g, make sure you are following your laws. Its always nice to grow real plants in the aquarium to mimic their natural enviroment but its not always needed. Personally i like to make mine look as close to a lake or river as possible, i've got plants and driftwood, lots of rocks, and i filled mine with sand i collected from the local lake here, you can basically do anything you like.