You'll want a smaller species in a 10 gallon so you'll have room for a decent number of them. Pygmy and dwarf cories are perfect if you can find them--you could fit five or six in your tank. If you can't find those (I couldn't...I guess it depends on what your lps/lfs stocks), then I recommend panda cories. They're not as small as dwarves or pygmies, but they stay smaller than most corydoras species. I have four in my ten gallon; they're really cute! There is a link in my sig to a video of three of mine playing. :)
They tend to be pretty sensitive though, so make sure you keep up with water changes, and use sand or fine/smooth gravel as substrate.
Last edited by LolaQuigs; 04-03-2011 at 09:28 PM.