Well my tank is very empty without my Pacu. So Im looking into getting some more fish sometime after Xmas. I have 3*10" Wild Oscars, 2*8" Tinfoils, 1*8" Black Shark, 1*8" Sun Cat. The tank is 72*20*24(150 US gallons) and has 3*Rena Filstar XP3s, 2*Emp 400s, and 1*Magnum 350....and currently is on the schedule of getting a waterchange weekly of around 30-40% and has never had nitrates above 10ppm and thats when I let it go for more than 2 weeks. I had plans of upgrading the tank to a 225G(72*30*24) within the next year for the Pacu, which still may be in the works depending on what fish end up going into it. But with that knowledge what would you do with it, how many of what fish would you add to it?