or how bout the dimensions W: 3" H: 20" L: 450". then i could put discus and datnoids in facing the right side of the tank and compressed piranhas facing the left... that way none of them can fight unless the piranha jumps out, spins 180 and lands perfectly or swims upside down.
EDIT: Jk.
i seriously would rather have length than anything else though... realistically... maybe 300" 18" 20" or something.