Hello! My Fluval 404 has gone to the giant tank in the sky and now I need to buy a new filter tomorrow morning. The city I'm in is small so my options are limited to the Fluval 405, 406 or FX5. What would you all recommend for a 72 gallon tank with large fish in it? I know the FX5 is a bit overkill but my tank might benefit from it. If I can get a decent price, I'm kinda leaning that way unless somebody has some info for me.