i believe its better for the width of the tank to be bigger,mabye can try for 8x3x3 or 8x2.5x.2.5. I know lots of people switch from 4x2x2 to 4x2.5x2.5 after 2 years when their aros grow bigger as the aros will have difficulty turning in a 4x2x2 than a 4x2.5x2.5.A 8x2x2 can put 3 to 5 silvers in...