My grandmother has had a fish tank for as long as I can remember, and she recently got rid of all her old fish and got 2 Salvini cichlids, 2 port cichlids, 6 tiger barbs, and 2 cory cats, and a pleco. I have already told her that the Salvinis will need to go so we're takig them back tommorow. I was wondering if anyone had any ideas for replacements, preferably something hardy.