My brother has a betta in a 1 gallon tank, and I have been telling him to put it in a five gallon tank. He doesn't know which one to get. The options are; fluval chi, aqueon mini bow 5, top fin aquascene 5, marineland eclipse hexagon 5, a plain 5 gallon rectangleand the fluval edge (its 6 gallons but still an option). What tank do you guys think would be best?