max size can be larger than that especialy in a larger tank. in my experience they can grow at a decent pace with feedings, no stress... the bleekeri is about the same and i really cant notice a huge difference except the obvious spot size. the bleekeri can grow larger though. i had a polleni in a community for about a year. most fish were bigger than my P. it did not show aggression at all but i never saw him back down to any of his tankmates. btw awsome you found a P in your lfs. thats a come up!