Well if you want a clownfish it shouls do fine in your tank with out an anemone. Most would get to big for that size tank anyway. And if you eventually want corals you shouldnt get an anemone anyway. The clownfish can do fine without one. Aldo, the are many nice corals you could add to your tank in the future if your lighting is right. I hope we can help you out with whatever else you may need.