5-10 Tiger Barbs.
or
Since you are on Monsterfishkeepers.com, then start a breeding pair of Convict Cichlids......I do not know your personal collection yet, I have not read about......But if you are new to the monster communtiy(I see you have 156 posts), then you will definately be influenced to start a MONSTER TANK......The best cichlid to start off with to learn and to respect more about the cichlid world is the Convict Cichlid........The Convict shows the basic breedinf procedure of every medium to large cichlid........It also show the degree of fashion you can possibly address your cichlid by means of food preperation..........
or
Start a planted tank......A 10g is perfect to experiement aquatic plants.....Becuase of the size, a 10g tank is not that expensive to maintain when dealing with plants.....A small C02 kit does not cost a lot for this size of a tank..........The light fixture also does not cost an arm and a leg..........
Hey importracer, super off topic, but why don't you simply press enter?