Yeah I guess I would have to agree with Alice, but some small fish to consider: Dottybacks, red headed gobies, neon gobies. My son has a 10 gal nano reef with an orchid dottyback and a domino damsel and is having a red headed goby on hold for him. Of course he uses a 20 gal refugium and a 10 gal sump for a 10 gal nano.
Ray
Ray