This is not a safe road to go down. Many think a larger tank is planned, but it doesn't materialize. The losers are the poor fish. I learned a maxim many years ago--I will never even consider acquiring a fish for which I cannot today provide the proper environment (tank size, and the other habitat needs for the species) to house the fish at maturity in the numbers they expect. These needs are in the species' genetics, and the fish expects them. It is not being kind to the fish to force them into inappropriate environment, be it tank size, numbers, decor or tankmates.