I have a 55 gallon with a few plants in it, a 150 gallon with a couple oscars I adopted and a 220 gallon with my Jardini, festaes, and pacu. I am picking up a marble sailfin cat and a couple parron sharks. i have a sweet deal worked out with my fish store. I get them small and when they get big we move them to some of the company tanks they service.