if you do get one get a black they are easier to keep and adapt to food easy. you would be fine in a 34g as long as it eats prepared foods.
i have one in a 50g with no live rock or sand he hunts all day so not a "big swimmer" mine eats everything from pellets to frozen to pods.
i currently have 2 black ones, one in a 90g and one in a 50g both adapted to prepared foods right away.
the red not so much
