Not only is tank gallons important...so is length....I would say at least a 6' tank.....they get quite large.
They also like a lot of rock work becuse they like to hide in there....I have a blue hippo with a sailfin and yellow tang, coral beauty, flame angel, 2 perc clowns, pajama cardinals, bi-colr and lawnmower blennies, green chromis, foxface, golden head goby, yellow coris wrasse, pseudochromis, mandarin, yellow tail blue damsel, blue cleaner wrasse,
LOL....I feel like I am forgetting someone heehee
That is an example of some things it gets along with LOL