But just in general, with a tank this size and fish that max out at 20", I think 5 would be ok assuming they get along.
And how many years of experience do you have with Pbass, Adam? I'm just curious, I'm guessing about the same as you have with Asian aros. Am I close?
It's not just about the max size of a fish, vs how they fit in a glass box. Some 20" fish just lay there 24/7, others are at times like torpedos with fins. If you don't have any personal experience it's probably best to just allow those who do, to weigh in on the subject. I would think that would be obvious, I guess not.