Hi all. I'm going to be starting a new tank in a few months, thinking about a 20-30 gallon long. And what I would like to put in there are either smaller cichlids (Rams?) or multiple kinds of tetras. Would it be possible to have sharks in this range of tank sizes? I'm not sure what kind of sharks they are, but the last time I was at the store, there were fish with long, navy blue bodies, and red fins. I'm thinking they were either bala or red tail sharks.