hey guys i'm new to this and i just brought a 150 gal tank, with stand, canopy, two americal filters, one dual and one single chambers, heater, two power heads, lights and some more good stuff, now i dont know if i should go with freshwater or saltwater, in freshwater i like piranhas (black ones or red) and in saltwater, i can do trigger, ell, clown and bamboo shark, what are your thoughts, and thanks in advance!