If I can add to Mike's comment. A dedicated electrical circuit of at least 20 amps would probably do it. If you think your 15 amp will handle everything, make sure you don't have other outlets that are ganged into it. Most rooms have multiple outlets feeding one breaker with lamps, computers, tv, etc. being run on it. Adding the aquarium equipment would be a good way to keep popping the braker, and don't even want to mention worst case. Also change or have an electrician change the breaker to a GFI one.
wayne