Awesome, he'll learn to love the extra swimming room in the 55. I do think the dithers will help, especially if you pick a calm, schooling type that he can mimic. Seems like they will somewhat pick up on the behaviors of the other fish in the tank, if you pick up some calm dithers he should stay calm, if you pick up some curious/active dithers then he should lean towards that. At least that's what I've seen to be true between mine and sm0ke's - two completely different types of behavior (his is housed with altum angelfish, and mine with the tetras). That's the most obvious difference that I can find between the two.
So what's the new fish???
So what's the new fish???

