when to upgrade

[eieio]

I have a 5" huma-huma in a 55 by himself w 40# of LR. How long will he be happy before I need to upgrade the tank? How much bigger should I go? He'll have the tank all to his self.
THX

 

[goofieones]

As it goes, no matter how big you go, someday down the road you will wish you went even bigger. If you go bigger than a 75, you could probably add another fish or so,and keep an agressive setup.