Im going to college after this year and I need to condense all of my tanks into one 40gal aquarium. Im looking to try something new. I have experience with saltwater fish only, reefs, and monster fish tanks. Im looking to get into something new with this 40, and I am willing to do brackish, fresh, or saltwater. Im interested in hearing what different kinds of species of puffer I might be able to house in a 40. Looking for something that gets a little bigger, I dont want to have 4 dwarfs in there, but just maybe one thats 5-6" long. Thanks. 