I was given a 3'x18"x25" tank by a coworker today. My question is this, I have a 29g set up with two calvus and 7 multies . I want to move them all to the new 70ish tank. Tue footprint is a bit bigger so would I be able to add something else (mid to top dwellers), or is not even worth trying. I know footprint is the big factor here so going from 29x12x18 to 36"x18x25 is not really much more. Any help is much appreciated.