don't rush with the big tank, though
Paretroplus are like Bonsai trees. they grow slow, very slow.
it'll be at least 2 or 3 years before they're passing the 6-7" mark and at that size this tank is still plenty big enough
also: it's best to start with a larger group. they can be very nasty in small groups. best get 8-10 or so and raise them; once they are 8" or so, you can either buy a larger tank or select.
anyway; from 2" to 8" takes a few years.
"And he piled upon the whale's white hump the sum of all the rage and hate felt by his whole race. If his chest had been a cannon, he would have shot his heart upon it"