Yup, it appears to be a three lined, which is what is often referred to as "false julii". True julii's are rarely imported. They do best in shoals of 6 or more, but 4 at the very least are needed. They are very active little catfish that really do need a minimum of a 20 gal tank. The only cories small enough to thrive in a 10 gal are the pygmy cories which are hasbrosus, nanus, pygmaeus, and hastatus.
I consider 20 gals the minimum for rummynoses as well. The only tetras that work in a 10 gal IMO are neons and embers. If keeping them in a 10 I wouldn't add any other fish to the tank.