The fish avaliable to me are about 1.5", roughly how many years untill they get too big for the tank like that? I'm going to have to rehome my fish before leaving for college anyway; I have a LFS that loves to take large clowns and cichlids; they put them in 200 gallon display tanks and sell them for outrageous prices. If I get the tank I'm probably going to get the clowns.
My family is likely getting a large tank in a few years; It's going to be either 2'X2'X5' or 2'X2'X8', so between the possibility of pet store and massive tank, they should have a home. 3 6" clowns would be fine in the tank I described, right?